Hui Zhou Gaoshengda Technology Co., LTD Medel Confirmation Letter We, Hui Zhou Gaoshengda Technology Co., LTD.Certify the product: WIFI+BT Module , And item No.:WCT1BR2201D,WCT1BR2701T Their electrical circuit design, layout,antenna, components used and internal wiring are identical,Only the WiFi antenna installation method is different. Signiture: /7@ Gan Contact: Hui Guan Company Name: Hui Zhou Gaoshengda Technology Co., LTD Date: Dec. 20, 2018