The MA-10B series is specially designed for the bass guitar. This model has dual Normal/Drive channels. The MA-10 series is compact and portable. There are 2 hidden shoulder strap clips on both sides of the amplifier. It includes a high-quality Aux In Jack for backing track playback and a 3.5mm stereo headphone output Jack. Clear sound is provided by 5-inch full-frequency speakers with a nominal power of 10W (RMS). It offers different power modes, you can use the included power adapter or 6xAA batteries, approx. 3h battery life with AA alkaline batteries.