Electronic Smart Lock Remote Control Keyless Phone Control APP Entry Electronic Door Lock Wireless Anti-Theft Deadbolt Lock Note: if you select wifi option, the app is tuya or smartlife app. If you select bluetooth version, the app is ttlock app. If you select no phone control version, you can't control the lock by phone. perfect for:office,home,hotel,anti-theft door,corridor door,wooden doors,garage door,etc. Remote controls:with digital conversation system,it cannot be decoded or duplicated.Anti-theft and bring you safety. Made of stainless steel:provide long service life,very strong and steady.Power saving and low battery consumption. Easy and firm installation:with the external mounting plate.The bottom panel design makes installation easier and more stable. Once the main batteries are depleted:you can use the backup battery,no worries about dead battery and be locked outside. Remote Control Distance:10m/32.8ft Power Supply:4* AA Battery(not included)&1* 23A 12V Battery(included) Unlock Current:100mAh Battery Life:4 batteries last for 16 months in standby mode Working Temperature:-20-70 Working Humidity:20%-80% Lock Tongue Moving Distance:23mm/0.90 inch Item Size:137*77*37mm/5.39*3.03*1.45 inch Item Weight:67g/23.67oz Color:silver Material:Stainless steel Package Contents: 1* door lock 1* bottom gusset 1* door bolt holder 1* screw kit 1* 23A 12V battery 4* remote control (If you seleict BT phone control, it is ttlock version) 1* English-Chinese User Manual 1*wifiAdapter (depend on your option) Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.