When connected to an alarm system, the WS-280 is an effective crime deterrent and can easily work with other sirens in the same system. The unit can also work with other accessories such as remote controls, door/window contacts and PIR detectors on the same radio frequency to build an on-site alarm system.

Specifications
* Power supply: DC 12V 500mA
*Backup battery: 18650 3.7V 1200mAh rechargeable lithium battery
*Maximum alarm current: ≤350mA
*Static current: ≤14mA
*Wireless receiving distance: ≤80m (in open area)
*Operation condition: Temperature -10°C ~ +55°C
                                        Relative humidity ≤80% (Non-condensing)
*Maximum siren volume: 105dB
*Battery standby time: ≤3 days
*Radio frequency: 315MHz or 433.92MHz (±75KHz)
*Housing material: PC+ABC+ANTI-UV
*IP rating: IP 54
*Dimensions: (L×W×H)245.2 x 227.5 x 72.4mm