The BJFE Little Green Wonder is an overdrive pedal with high headroom and emphasized low-mids. Designed to replicate the sound of a stack amplifier, this overdrive pedal delivers exceptional performance in any pedal setting. It covers everything from a smooth, simple TS-style overdrive to a more aggressive, gritty distortion. L: Adjusts the overall volume. D: Adjusts the distortion, from low-gain overdrive to sounds with heavy distortion and edge. B: This adjusts the response from low to high frequencies, focusing on the midrange. T: This adjusts the high-frequency response. The Little Green Wonder operates on a 6F22 9V battery or a standard 2.1mm barrel type center-negative DC 9V adapter. Z in at 1kHz: app. 500kHz Pout 1kHz in 50k: app. 0uW70 RMS Max load: app. 10K Max output: 3V peak Max current consumption: 5mA5 at 10V Upper frequency -3dB: approximately 10kHz Maximum gain at 1kHz: approximately 58 dB Max input signal: 3V peak Supply Voltage range: 7V5-18VCondition: No problems with use. Points to note: Consigned used item. Accessories: Box. Warranty: No used item warranty as it is a consigned used item.