1. Tone charactor: Siren, manual, wail, yelp, hi-lo, horn, radio. 2. Handhold mike, with controller. 3.Monolithic integrated 1. It conform to national standrad GB8108-1999. 2. Tone charactor: Aux, yelp, hi-lo, wail-1, wail-2, wail-3. Siren, horn and so on. 3. Handhold mike. With controller. 4. Monolithic integrated circuit in steadier performance. 5. TECHINICAL DATA: Voltage: 12V/24V Power: 100w, ...