Features DUAL POWER OUTPUT: 2 channel stereo amplifier board, can output 5W+5W power at 5V supply , can directly drive 4Ω, 8Ω small speakers. SIMPLE POWER SUPPLY: Unique class D digital power board without LC filter, which can directly use the USB power supply of the computer. CONVENIENT WIRING: Double panel wiring, properly solve the ground potential balance and crosstalk between channels caused by wiring LESS INTERFERENCE: Use machine for whole board welding, with excellent noise suppression, low noise without intervening audio. COMPACT SIZE: Ultra miniature design, can be easily placed in the small internal space of various digital products, has high efficiency. Specification: Item Type: Digital Amplifier Board Material: PCB Rated Working Voltage: 2.5-5V Limit Working Voltage: 5.5V Power: 5W + 5W Use: Electronics Package List: 5 x Digital Amplifier Board Package List 5 x Digital Amplifier Board