1.With backup battery,112+/-3dB 2.6tone(1tone optional) 3.Output power: 20W 4.Rated current: 1200mA 5.Working voltage: 9-16V Siren with backup battery, horn, speaker,car siren1.With backup battery,112+/-3dB2.6tone(1tone optional)3.Output power: 20W4.Rated current: 1200mA5.Working voltage: 9-16V Backup battery car alarm siren, horn, speaker,car siren, one tone, six tone