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. State guest, ambulace, fire, police, clear the way, double state guest, double ambulance, mix fire, mix police, mix fire and police.3. Handhold mike. With controller. ...