he Fishman BII Acoustic Bass classic preamp has been completely redesigned from the ground up. Formerly known as the Model B, the new Fishman BII Acoustic Bass classic preamp is crafted specifically for acoustic upright basses. On the inside, all new electronics deliver cleaner, more transparent sound and an unprecedented 400 hours of battery life. The preamp is housed in a rugged, lightweight injection-molded case, measuring 1.375″ high x 3.5 wide x 5″ long. This unit comes complete with rubber feet .