BOSS ODB-3 BASS OVERDRIVE Crunchy Overdrive Effects for Bass. An overdrive effect designed to hide all of the frequency vary of bass guitars, together with 5-string basses. Overdriven sounds will also be blended with dry bass signal for optimum clarity and punch. Powered by 9v PP3 battery (provided) or optional PSA230 / PSA240 power provide. 5 Year Boss pedal guaranty when registered on-line.