Enter the world of amazing electronic sounds and noises. Create or imitate sirens of all kinds by adjusting 3 trimmers. Powerful sound with a 2W amplifier on the PCB. Specifications •power supply: 8 - 14VDC / 1A •modulation speed: 0.5 - 5s •frequency: 300 - 6000Hz •output power: +/- 2W max. •dimensions: 80 x 55 x 15mm/3.14 x 2.16 x 0.6"