1Smart Panel4 inch screen Labellength 4.4cm, wide 1.8cm, Put it in the groove on the back of the product. Label Location 2Smart PanelIntelligent Key Control Labellength 4.4cm wide 1.8cm Put it in the groove on the back of the product. Label Location 3Wireless Gateway Labellength 9.2cm, wide 4.2cm, On top of the front of the product. Label Location