SL501 Touchscreen Digital Deabolt Door Lock
① 3 level volume control<br>② Mute Mode<br>③ Imaginary number function<br>④ Security system<br>⑤ Intruder detection and damage warning<br>⑥ Electric shock disabling security system<br>⑦ High temperature sensor (e.g. against fire) and automatic open system<br>⑧ Automatic / Manual setting<br>⑨ Batter replacement notification<br>⑩ Double-lock function<br>⑪ Emergency power supply in case of battery discharge<br>⑫ Home automation system connection or wireless remote control support