DES-700WL-B - Wireless Door Entry Alarm System

Easy to install. Wireless 433.92mhz transmission up to 100m (open space) from PE beam to speaker.
Applications: garage door/doorway/overhead door/entrance/supermarket/restaurant/warehouse
Includes:
1 x Wireless retro-reflector PE beam sensor (range 5-7 meters)
1 x Wireless speaker (chime/alarm sound selectable)(duration & volume adjustable)
1 x Reflector RR80
2 x AC/DC adaptor, one for sensor, the other for speaker
1 x Mounting brackets and screws for sensor