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: --10℃ to +55℃(14℉ to 131℉), less than 95% RH Installation: Wall mount Dimension: 134 × 74 × 33mm (5.3 × 2.9 × 1.3inch) Weight: 0.13Kg (0.29lb) Certification: C |