Joyo'S Ma-10B 10W Mini Bass Amp Dual Channel Small Carry Bass Amplifier Combo JOYO MA-10 series features dual channel dedicated for the related instruments switching easily. MA-10B: Switchable Normal / Drive dual channel. 5 inches customized full frequency speakers. with rated power of 10W (RMS), full frequency speakers dedicated for the related instruments. High quality Aux In Jack for playing backing track, 3.5mm stereo headphone output Jack, ensuring subtleness of music and interference-free. Different power supply modes, we can use the attached power adapter or 6xAA batteries, about 3hrs battery life with AA alkaline batteries. Innovative logo will light when it's switched on. Compact and lightweight body, plus 2 hidden shoulder strap buckles on both sides of the amp for conveniently hanging the shoulder strap(not including), easy to carry. Directly sold by manufacturer of JOYO Technology Co.,LTD which established at 2006.