The GRID SLAMMER™ Overdrive is an overdrive pedal that produces a variable boost in gain over a wide range with a classic, guitar-centric midrange bump that enhances many different playing styles. It’s a true overdrive “specialist” that covers an amazing array of what many top players consider the most expressive and musical ranges of overdrive. From sweet, subtle breakup to a harmonically smoldering overdrive that can both sting and sing, the GRID SLAMMER sets a new bar in legendary overdrive! PRODUCT FEATURES: Designed and Hand-Built in Petaluma, California, USA True Bypass On/Off Switching - Bypasses all circuitry when off to ensure no tonal loss Gain Control allows you to dial in the perfect amount of vintage breakup or classic overdrive Master Level Control provides a variable range of signal boost up to +20db Tone Control balances the amount of high frequencies On/Off Status LED 9V Battery Powered or optional AC Powered via External Power Jack Input Input & Output Jacks (Nominal Input -20 db) SPECIFICATIONS: Dimensions (W/D/H): 2.87" x 4.77" x 2.28" (73mm x 122mm x 58mm) Weight: 0.731lbs (332g) with battery, 0.631lbs (287g) without battery True Bypass Switching Battery Type: 9VDC (one) Power Consumption (Current Draw): 9VDC/15mA AC Adapter (Optional): Power Jack 2.1mm x 5.5mm, 9VDC with Negative Center (Regulated Recommended) Input Impedance: 1M Ohm (500k Ohm minimum) Output Impedance: 10k Ohm