*Powered by solar panels, no main power needed
*Compatible with any Chuango alarm panels and sensors
*Weatherproof and stylish design
*Built-in 18650 3.7V/1800mAh lithum battery enable 45-day standby
*Fully tamper protection
*Piercing 110dB siren with selectable duration (30sec./2min./5min.)
*Volume ajustable (High/Low/Mute)
*Available for red or blue siren
*ABS+PC+Anti-UV plastic cover, IP55