What is a Zia Drive? A very tight low compression overdrive pedal designed to be that perfect rhythm guitar box. If you hate the feeling of sag in your fingers this is the box for you. It takes your 6L6 or 6V6 amp and gives it the chime of an EL84. If you have an EL84 amp it will boost that bottom end and make it sing at lower levels. Early 70's Stones fans will love the ZIA!! FEATURES: Totally hand built/wired Teflon wire throughout Switch Craft jacks Alpha full size potentiometers Brightest Blue LED in the business Uses standard negative tip 9V DC supply (not included) 2 year warranty Sound is NOT colored while bypassed Not True Bypass - We tried true bypass, and we didn't like it Dimensions 2 1/4" x 4 1/4"