SEAPHY Motion Sensor Light Door Wireless Doorbell,Security Burglar Alarm, White Four functions:Wireless Doorbell,Security Burglar Alarm,Motion Sensor Light,Emergency Flashlight Automatically turn on the light only when it is dark and motion is detected 36 chime tones with 3 levels of adjustable volume.Up to 500ft/150m operating range in open space Alert you or your neighbors of a possible break-in and scare them away Battery powered with no wiring and no electrician needed