Features:- Adopts Pyroelectric Infrared Radial Sensor technology- Supports movement dectection- Automatically illuminate the keyhole as you approach- Automatically turn off as you left- No more fumbling by your door in the darkGeneral Specs:LED: Super white LEDLED life: 100、000hoursSensor sensitivity angle: 60＜Sensor sensitivity distance: 3mPower: 1x 1.5V battery (Not included)Stanby current : <0.35mAOperating temperature: -5≧-38≧Operating humidity: 5%-93%Product size: 81x46x30mmWeight: 55g