Robodo PAM8406 digital amplifier board 5W×2 volume adjustable D class module Sound Recorder and Sound Circuit Electronic Hobby Kit

"Product parameters: 1. Ultra volume: 23*24MM Weight 0.45 grams. 2. Excellent noise suppression, you will hear any noise without connecting input audio. 3. Dual-channel stereo, only needed 5V power supply can input 5W+5W power, it can drive 4?, 8? little speaker. directly, with large output power, enough energy, superior quality, and left right channel volume adjustment. 4. The unique non-LC filter Class-D digital power board, can be used computer USB to charge. 5. Dual-panel wiring, can properly solve the ground potential balance and crosstalk between channels caused by wiring. 6. Super mini design, can be easily placed in a variety of digital product’s inside small space. 7. Used machine to weld whole plate. 8. Rated operating voltage is 2.5-5V, the limited operating voltage is 5.5V. Note: The “negative” of left and right channel output port can not be connected together, otherwise it will damage IC, you should connect the speaker before charging."