This solar powered siren is completely wireless and can be easily set to different sound levels (loud/quiet/off). The solar siren is powered by the built-in solar panel which powers the built-in backup battery. This eliminates the need for a power source and can be installed and configured in minutes. The siren can be used as a wireless siren when working with your alarm system, but it can also be used as a standalone alarm system with wireless sensors from Chuango. So you can only teach accessories to the mermaid. In this case, the SPS-260 functions as a base station. It is therefore a less expensive alternative if you do not feel the need to be notified by telephone in the event of an intrusion.
operating temperature: -30øC to +70øC
humidity: <80% (non-condensing)
Works with: 2 lithium-ion 1.5V DC 1800mAh batteries (rechargeable) supplied.
transmission distance: <100m (in free field)
housing material: ABS plastic, PC, ANTI-UV, IP55
dimensions (L x W x H): 309 x 230 x 80mm
Standby time: 9 days (without sunlight)
adjustable alarm duration: 30s./3min./5min.