Made between 1986 and 1993, the TS-10's were the underdog of the tube screamer series until John Mayer started using them exclusively. With a little more gain on tap than the classic TS808 or TS9, this TS-10 was made in Japan, and has the black logo on the back of the pedal. The LED has been changed out from red to blue, and there has been some additional modding done to it, although we're not exactly sure what sound characteristics have been changed. Still sounds great though! Cosmetically, it's seen better days, but still functions 100% as it should. Powered by a 9 volt battery, or 9 volt power supply.