This JOYO MA-108 Micro Amplifier is perfect for bass guitar players who want a compact and powerful amplifier. With 10 watts of power and a hybrid amplifier technology, this combo amplifier delivers great sound quality. The MA-10B model has 2 channels and 1 speaker, which is suitable for small gigs and practice sessions. It is made by JOYO, a well-known brand in the music industry. This amplifier is in great working order and has been thoroughly tested.