... ,mob,tel,key TAIYITO TDX4488 Fingerprint Door Lock smart lockIt can fixed with burglarproof door, wooden door, office door etc, have four ways to open ... state power consumption120 --210 milliamperes16Work voltageA total of 1.5 volts four alkaline batteries, 6 volts DC17Battery life>8 ... home, you can make a call to check the door is open or closed. TAIYITO TDX4488 Fingerprint Door Lock smart lock