... , With room No, live status,make up room,no disturb,touch key door bell five function,light indicate. 5 in 1 ... ,With room No, live status,make up room,no disturb,touch key door bell five function ,light indicate .Don't disturb and ... :-10°C--60°CWorking humidity:50°C 10—95%RHTouch key life:Capacitive unlimited touch key. Touch key door bell for hotel