1. It conform to national standrad GB8108-1999.

2. Tone charactor: Aux, yelp, hi-lo, wail-1, wail-2, manual, Siren, horn.

3. Handhold mike, with controller.

4. Monolithic integrated circuit in steadier performance.

5. Technical data:
Voltage: 12V/24V
Power: 100w
Impedance: 8¦¸
Sound compression level: 110-120dB

6. Overall size: 194mm(L)x155mm(W)x57mm(H)