An awesome 2.1 amp from Aiyima Audio. This amplifier is completely made from alloy steel and very well assembled. All the rotating knobs and switches are very high quality and soft moving, like on prime expensive amplifiers. And the most important the audio is very good to! I am very impressed with the all possibilities to adjust your perfect sound. This is one of my favorite amplifier on a that budget price range! Well done Aiyima!!!

AIYIMA A03 amplifier link: https://www.aiyima.com/products/bluetooth-amplifier-aiyima-a03