Two-way wireless outdoor siren that uses LoNA technology, 433Mhz frequency, completes the wireless alarm system. This siren is easily installed thanks to its wireless communication, its power and learning technology. It also meets the safety requirements of EN50131. The lithium battery pack (BS7201-N) typically provides 3 years of battery life (subject to use). Meets the safety requirements of EN50131. Battery life: 3 years. Power: 120 dB 100,000 lumens Reach up to 400 m. Dimensions: 300x210x87mm.