This is a wireless mains powered indoor strobe siren. Excellent as a visual deterrant and to act as an immediate alert should an intrusion on your premises occur. You can connect as many as these as you like to you alarm control panel. It simply needs to be plugged into a mains power point and comes with a built-in rechargeable backup battery in case of power failure.

Specifications:
Transmission range: 40 metres (open area)
Transmission range: 30 metres (through two walls)