BOSS GEB-7 is a 7-band equalizer created specifically for the frequency range of the electric bass. The EQ bands can be boosted or cut up to 15dB, while a gain control also offers a +/-15dB range. Since the GEB-7's frequency range extends down to 50Hz, it's also great for adding depth and bottom end to acoustic guitars.
Used and worn, a few plastic tips on the band are cracked but still holding up find. Each spot moves easily, tested recently with 9v battery.
Fun to use, can kick on to fill out sound during a guitar solo among many other uses.