Tiptop Audio Hats808, Drum Module, Based on the original TR 808 circuit, Additional features: Independent Accents, High Gain Level, Pulse Shaper and Voltage Controlled Q Factor, Includes two sounds: Open and closed hi-hat, Analogue sound generation with six analog square wave oscillators sent through bandpass filters, Width: 8 HP, Depth: 14 mm, Power requirements: +30 mA (+12 V) / -25 mA (-12 V)