Everybody Hertz Dub Siren. This is my version of the classic’Dub Siren’ sound, featuring an analogue oscilator, a digital Tap Tempo Multi-waveform LFO (modulates the oscilator pitch) and inbuilt delay circuit. Triangle or Square wave Oscilator selection. High / Low pitch range switch. Modulation Speed Knob overides Tap Tempo button. Tap Tempo buttonoverides Modulation Speed Knob. Modulation shape knob (switches between Ramp up / Ramp down / Square / Triangle / Sine / Sweep / Random Steps / Random Slopes). Delay Repeates (can be driven to self oscilate). 1/4 inch Jack output (line Level). 12 to 15 v DC input (centre positive). Comes with UK DC power adaptor.