IMPROVES YOUR OVERALL TONEThe CS-3 Compression Sustainer pedal compresses louder signals while boosting lower signals, providing smooth sustain without degrading the original sound quality. This is the perfect pedal for guitarists and bassists who want to sound their best. Compact compression/sustainer pedal with high-quality circuitry Compresses loud signals and boosts softer signals for a smooth overall sound Onboard Level, Tone, Attack and Sustain controls for precise tonal shaping Low-noise design for super-quiet operation BOSS five-year warranty SPECIFICATIONS Nominal Input Level: -20 dBu Input Impedance: 1 M ohm Nominal Output Level: -20 dBu Output Impedance: 1 k ohm Recommended Load Impedance: 10 k ohms or greater Bypass: Buffered bypass Controls: SUSTAIN knob ATTACK knob TONE knob LEVEL knob Pedal switch Indicator: CHECK indicator (Serves also as battery check indicator) Connectors: INPUT jack: 1/4-inch phone type OUTPUT jack: 1/4-inch phone type DC IN jack Power Supply: Carbon-zinc battery (9V, 6F22) Alkaline battery (9V, 6LR61) AC adaptor (PSA series: sold separately) Current Draw: 11 mA Expected battery life under continuous use: Carbon: Approx. 14.5 hours Alkaline: Approx. 34.5 hours *These figures will vary depending on the actual conditions of use. Accessories: Owner's manual Leaflet ("USING THE UNIT SAFELY," "IMPORTANT NOTES," and "Information") Dry battery/9 V type (6F22) Options (sold separately): AC adaptor: PSA series SIZE AND WEIGHT Width: 73 mm(2-7/8 inches) Depth: 129 mm(5-1/8 inches) Height: 59 mm(2-3/8 inches) Weight: 390 g(14 oz)