Imou Siren Sensor: Sound Intensity: 85dB (1m(3.3ft) Wireless: Wireless Frequencies: 433MHz Transmit Power: 10dBm Transmit Distance: 250m(820ft) open area General: Tamper: Front cover and rear cover protection Power: 4 x CR123A batteries, 1.5 years battery life Working Environment: --10β to +55β(14β to 131β), less than 95% RH Installation: Wall mount Dimension: 134 Γ 74 Γ 33mm (5.3 Γ 2.9 Γ 1.3inch) Weight: 0.13Kg (0.29lb) Certification: C |