Specification:

1.Amplifier chip: XPT8871 chip
2.Size: 20*16*8MM
3.Number of channels: Mono
4.The maximum output power: 5W

5.Wide voltage: DC3.7-5V

6.Power supply voltage: 5V, 1A

7.Weight:15g

Package Including: 

1 * Amplifier Board Audio Module