1. 2 in 1, 5 tone/ 3 tone Horn speaker/siren with microphone. 2. DC 12 V. Output power: 60W. Tone: Wail, Yelp, Horn, Police. Characteristic: This electronic siren is applied to various vehicles ( For example: car, police car, military car, fire engine, ambulance, shippings, industrial & mineral fields etc) . And used as alarm and amplifier. Horn speaker MH-82002-R