FCC ID: 2A99N-BAJBC11 Smart Back Cushion

Smart Back Cushion User Manual Table of Contents 1 Included in the box

........................................................................ 2 Product at a glance

........................................................................ 3 First Use

................................................................................... 3.1 Charge Smart Back Cushion Before First Use

.................................... 3.2 Preparation

....................................................................... 3.3 Inflating

........................................................................... 2 3 7 7 8 9 3.4 Deflating

.......................................................................... 11 3.5 Set Up Smart Mode

............................................................... 12 3.6 Remote Control

................................................................... 13 3.7 Turn off Automatically

............................................................ 14 3.8 Turn off Manually

................................................................. 14 4 Daily Use

................................................................................... 15 4.1 Get Ready

......................................................................... 15 4.2 Recall your Sitting Number

....................................................... 16 5 Charging Weekly

........................................................................... 17 6 Reset Smart Mode

........................................................................ 19 7 Change Battery of Remote Control

......................................................... 20 8 Summary

................................................................................. 21 Page 1 1 Included in the box Smart Back Cushion Model: BAJBC11 Remote Control Model: BC11-C USB-C Cable User Manual Page 2 2 Product at a glance Smart Back Cushion Status Light of Smart Back Cushion Power Button USB-C Charging Port Page 3 Remote Control Status Light of Remote Control Screen Smart Mode Button

+ Button

- Button Battery Cover Page 4 Sitting Number Shown on Screen Inflation Level of Smart Back Cushion Page 5 Sitting Number Shown on Screen Inflation Level of Smart Back Cushion Page 6 3 First Use 3.1 Charge Smart Back Cushion Before First Use 1. Plug USB-C Cable into USB-C Charging Port. Connect Smart Back Cushion to a power outlet using USB-C Cable (included) and a power outlet (not included). Smart Back Cushion would automatically deflate for several seconds. 2. While charging, Status Light of Smart Back Cushion keeps flashing green. 3. Once fully charged, Status Light of Smart Back Cushion turns solid green. Charging:

Fully charged:

Page 7 3.2 Preparation 1. Have Smart Back Cushion and Remote Control ready. 2. Pull out the insulation sheet at the back of Remote Control. Screen of Remote Control would light up and show 00. Remote Control is on. Pull 3. Long press Power Button of Smart Back Cushion for 2 seconds. Status Light of Smart Back Cushion turns solid green. Smart Back Cushion is on. pause 2s smart B A J Smart Back Cushion 4. Put Smart Back Cushion on a chair, and sit on the chair. Light blue side of cushion should face toward you; the tag should be at your left side; the power button should be at your right side. Page 8 3.3 Inflating 1. Hold Remote Control in your right hand. Turn on Remote Control by firmly pressing + button of Remote Control. pause 2. Press + button of Remote Control firmly. Status Light of Remote Control flashes green once. Sitting Number shown on Screen will change from 00 to 01. smart B A J Smart Back Cushion pause 3. As a response, Smart Back Cushion starts inflating for several seconds until it gets to the next inflation level. Status Light of Smart Back Cushion keeps flashing during the process. smart Inflation Level Inflation Level B A J Smart Back Cushion Sitting Number Sitting Number Inflating:

Page 9 4. Press + button of Remote Control several times, Sitting Number can go up to 10, which is the highest inflation level. Inflation Level Sitting Number 5. The inflation level ranges from 00 to 10: 00 indicates the lowest inflation level; 10 indicates the highest inflation level. The higher inflation level is, the firmer support you will get from Smart Back Cushion. Refer to Page 5 and Page 6 for details. 6. The inflation process could take up to 2 minutes. During the process, sit on the chair, feel the lumbar support from Smart Back Cushion. Page 10 3.4 Deflating 1. You can also press - button of Remote Control firmly to deflate Smart Back Cushion, if you want to try softer lumbar support. Status Light of Remote Control flashes green once. Sitting Number shown on Screen will change from 10 to 09. pause 2. As a response, Smart Back Cushion starts deflating for several seconds. Status Light of Smart Back Cushion keeps flashing during the process. smart Inflation Level Inflation Level B A J Smart Back Cushion Sitting Number Sitting Number Deflating:

3. You can use + and - to control the inflation / deflation until you find your perfect sitting number. Lets assume its 06, and the rest of the user manual will use 06 for demo purpose. Page 11 3.5 Set Up Smart Mode 1. If you are happy with the Sitting Number you are currently enjoying, you can use Smart Mode of Smart Back Cushion. Your Sitting Number is remembered, and can be recalled later. Smart Back Cushion would inflate to the corresponding inflation level when you recall your Sitting Number. Inflation Level Sitting Number 2. Long press Smart Button of Remote Control for 3 seconds. The smart icon on the screen flashes three times, and then turns solid. Smart Mode is on. Your favorite Sitting Number is remembered by Smart Back Cushion. s m a r t 3s pause smart Smart Mode setting:

pause smart smart smart smart B A J Smart Back Cushion B A J Smart Back Cushion Page 12 3.6 Remote Control You do not need to turn off the Remote Control. Just leave it as it is. 1. With no further operation of Remote Control, Screen will fade out in 15 seconds. s m a r t 15s Backlight Off pause 2. After 3 minutes, Remote Control will turn off automatically. smart 3min B A J Smart Back Cushion Screen Off pause 3. To turn on Remote Control, press + button firmly. smart s m a r t B A J Smart Back Cushion pause smart Page 13 3.7 Turn off Automatically 1. Smart Back Cushion will automatically turn off after 9 hours. 9h 2. Smart Back Cushion will deflate to level 00. Status Light of Smart Back Cushion keeps flashing green during the process. Inflation Level Inflation Level Sitting Number Sitting Number Turning off:

3.8 Turn Off Manually Or, if you want to turn off Smart Back Cushion manually, just long press Power Button of Smart Back Cushion for 2 seconds. 2s Page 14 4 Daily Use 4.1 Get Ready 1. The next day, you should see Smart Back Cushion in 00 level (totally deflated). That means it turned off automatically after 9 hours of working. 2. Turn on Smart Back Cushion. To do that, long press Power Button of Smart Back Cushion for 2 seconds. Status Light of Smart Back Cushion turns solid green. Smart Back Cushion is on. 2s 3. Turn on Remote Control by pressing + button of Remote Control firmly. s m a r t pause smart pause smart B A J Smart Back Cushion B A J Smart Back Cushion Page 15 4.2 Recall your Sitting Number 1. Then press smart button firmly to recall your Sitting Number. Your Sitting Number will show on Screen accordingly. s m a r t Smart Mode starting:

pause smart smart 2. Smart Back Cushion would inflate to the corresponding inflation level. The process takes up to smart 2 minutes. Inflation Level Inflation Level B A J Smart Back Cushion Sitting Number Sitting Number Inflating:

3. When finished, the smart icon turns solid. Do not press any button of Remote Control during the inflation process. Page 16 5 Charging Weekly 1. We suggest that Smart Back Cushion should be charged weekly. 2. When the battery is low, Status Light of Smart Back Cushion turns solid red. Low battery:

Page 17 3. Plug USB-C Cable into USB-C Charging Port. Connect Smart Back Cushion to a power outlet using USB-C Cable (included) and a power outlet (not included). Smart Back Cushion would automatically deflate for several seconds. 4. While charging, Status Light of Smart Back Cushion keeps flashing green. 5. It takes about 3 hours to fully charge Smart Back Cushion. Once fully charged, Status Light of Smart Back Cushion turns solid green. Charging:

Fully charged:

Page 18 6 Reset Smart Mode If you need to have a new Sitting Number of Smart Back Cushion, you can reset Smart Mode. 1. To adjust Sitting Number of Smart Back Cushion, firmly press the + or - button of Remote Control. Inflation Level Inflation Level s m a r t Sitting Number Sitting Number 2. Long press Smart Button of Remote Control for 3 seconds. The smart icon on the screen flashes three times, and then turns solid. Now you have reset Smart Mode. 3s s m a r t Smart Mode setting:

pause smart smart smart smart B A J Smart Back Cushion Page 19 7 Change Battery of Remote Control It takes about 1 year for the battery of Remote Control to run out. A new 2032 battery is needed to replace the battery. 1. If the battery of Remote Control is low, Status Light of Remote Control flashes red, and the 00 on Screen flashes. Then Remote Control would turn off automatically. Status Light of Remote Control:

Screen:

pause 2. Open the battery cover by pushing it downward. Replace the battery. Then put the battery cover back on. smart B A J Smart Back Cushion 3. Press + button firmly to turn on Remote Control. Page 20 8 Summary Function Operation Turn on / off the Smart Back Cushion Long press Power Button of Smart Back Cushion for 2 seconds. Inflating Press + button of Remote Control. Deflating Press - button of Remote Control. Set up Smart Mode Long press smart button of Remote Control for 3 seconds. Reset Smart Mode Long press smart button of Remote Control for 3 seconds. Long press Power Button of Smart Back Cushion for 2 seconds to turn on Smart Back Cushion. Daily Use Recall your Sitting Number Press + to Turn On Remote Control. Presssmart of Remote Control to recall your Sitting Number. Power Button USB-C Charging Port Turn on / off Charging Page 21 FCC Statement:

Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:

(1) This device may not cause harmful interference, and

(2) This device must accept any interference received, including interference that may cause undesired operation. RF warning for Portable device:

The device has been evaluated to meet general RF exposure requirment. The device can be used in portable exposure condition without restriction. NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help.

YACCA MEDICAL (SHENZHEN) CO., LTD Add: 301. 401, BLOCK 117, MINSHENG INDUSTRIAL ZONE, SHANGCUN, GUANGMING, SHENZHEN,China Tel: 0755-26655922 Mail: zhangyangsong@bajhealth.com Attestation Letter Date: 03-21-2023 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Ref: Attestation Statements CFR 47 2.911(d)(5)(i)(ii) Filing FCC ID: 2A99N-BAJBC11 YACCA MEDICAL (SHENZHEN) CO., LTD certifies that the equipment for which authorization is sought is not covered equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. YACCA MEDICAL (SHENZHEN) CO., LTD certifies that as of the date of the filing of the application, the applicant is not identified on the Covered List as an entity producing covered equipment. Sincerely, Signature Contact Person: Yangsong Zhang Title: Engineer CFR 47 2.911(d)(5)(i)(ii) Attestation Letter

YACCA MEDICAL (SHENZHEN) CO., LTD ADD: 301. 401, BLOCK 117, MINSHENG INDUSTRIAL ZONE, SHANGCUN, GUANGMING, SHENZHEN,China TEL: 0755-26655922 E-mail: zhangyangsong@bajhealth.com FCC Authorization Date: 2023-03-21 FEDERAL COMMUNICATIONS COMMISSION Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Agent Authorization To whom it may concern:

We , YACCA MEDICAL (SHENZHEN) CO., LTD, Hereby authorizes China Certification ICT Co., Ltd (Dongguan) to act on its behalf in all matters relating to application for Equipment authorization, including the signing of all documents relating to these matters. All acts carried out by China Certification ICT Co., Ltd (Dongguan) on our behalf shall have the same effect as our own action. We, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 862. This authorization is valid until further written notice from the applicant. Sincerely Yours, Clients signature Printed Name: Yangsong Zhang Title: Engineer QA-FR-170-B

YACCA MEDICAL (SHENZHEN) CO., LTD ADD: 301. 401, BLOCK 117, MINSHENG INDUSTRIAL ZONE, SHANGCUN, GUANGMING, SHENZHEN,China TEL: 0755-26655922 E-mail: zhangyangsong@bajhealth.com FCC Confidential Authorization Date: 2023-03-21 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Confidentiality Request regarding application for certification of FCC ID: 2A99N-BAJBC11 In accordance with Sections 0.457 and 0.459 of the Commissions Rules, YACCA MEDICAL

(SHENZHEN) CO., LTD hereby requests long-term confidential treatment of information accompanying this application as outlined below:

Block Diagram Schematics Operation Description The above materials contain proprietary and confidential information not customarily released to the public. The public disclosure of these materials provides unjustified benefits to its competitors in the market. Sincerely, Signature:

Printed Name: Yangsong Zhang Title: Engineer QA-FR-171-A

U.S. AGENT LETTER OF ATTESTATION Date: 2023-03-21 FEDERAL COMMUNICATIONS COMMISSION Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Ref: Attestation Statements Part 2.911(d)(7) Filing FCC ID: 2A99N-BAJBC11 YACCA MEDICAL (SHENZHEN) CO., LTD certifies that, as of the date of the filing of the application, ETCHMED LLC is our designated U.S. agent for service of process for the above referenced FCC ID. YACCA MEDICAL (SHENZHEN) CO., LTD accepts to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission-related proceeding involving the equipment. ETCHMED LLC accepts, as of the date of the filing of the application, the obligation of the designated U.S. agent for service of process for the above referenced FCC ID. Designated U.S. Agent Information:

Company Name: ETCHMED LLC Address: 12 TOSCANYIRVINECALIFONIA, 94306 United States FRN: 0033644675 Tel.: 669609791 Email: lingb9688@gmail.com Signed by (printed name): Ling Bai Signature:

Applicant: YACCA MEDICAL (SHENZHEN) CO., LTD Add: 301. 401, BLOCK 117, MINSHENG INDUSTRIAL ZONE, SHANGCUN, GUANGMING, SHENZHEN,China Tel: 0755-26655922 Email: zhangyangsong@bajhealth.com Signed by (printed name): Yangsong Zhang Signature:

CFR 47 2.911(d)(7) U.S Agent