1. Independent super tweeter design, super loud alarm volume. 2. It can send out the response sound of arming and disarming, and can be used in combination with the host, door sensor, emergency button, etc., to provide high-pitched help and deterrence functions. 3. It has anti-dismantle function, periodically detects the self-function status and reports the performance status to the alarm host. 4. Small size, easy to carry and use. 5 The appearance is novel and light, suitable for installation in corridors, windows and other similar places. feature: Independent super tweeter design, super loud alarm volume. It can send out the response sound of arming and disarming, and can be used in combination with the host, door sensor, emergency button, etc., to provide high-pitched help, deterrence and other functions. It has anti-tampering function, regularly checks its own functional status, and reports the performance status to the alarm host. Small size, easy to carry, easy to use. The appearance is novel and light, suitable for installation in corridors, windows and similar places. Specification: Condition: brand new material: plastic Color: as picture shown Rated voltage: DC 12V Working voltage: DC 6-12V Rated current: 320/600/1200mA Output power: 15W/20W Alarm volume: 105~123 dB Package Weight: Approx. 65g/2.3oz packing list: 1 * Indoor Siren