150 Watt Police Siren & Speaker Hand Controlled 150 Watt Police Siren and Speaker. The siren has a digital microcomputer chip. handset controller which is also a microphone and illuminates for night use Siren tones: Ambulance, Fire, Police, Clear the Way, Phaser, Wail, Yelp, Horn. Technical info: Output 150 DC - 150 W, Power supply DC 12V, Output for light: 12V DC 10 Amp, Continuous work time 4 hours, Load impact 150 DC-8 Ohm. The siren has the capability of working withone or two speakers.