PAM8403 small power mini 5 V power amplifier board (can be powered by USB) (XY) USA plate PAM8403 digital power amplifier chip, the circuit is simple, reliable work.Operating voltage from 2.5 V to 2.5 V, 3 wx2 maximum output, efficiency can reach 90% or above, can use the computer USB 5 V power supply, is very suitable for battery and portable electronic products.Bat small size, and it is equipped with the switch, potentiometer, can follow its volume inclines, and control the power switch for use and installation is very flexible and convenient.Using all-purpose devices of the real thing may be competent for long-term

• This board could be powered by USB Power supply.
• Operating voltage: 2.5V-5.5V
• Maximum output power: 3W*2(5V 4Ω)
• PCB size is about: length 30mm width 22mm overall height after installed is about 16mm.