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1. Volume: 23 * 24MM, weight:0.45 g2. Excellent noise suppression. in the absence of contact input audio, you will not hear any noise even put your ear close to the speaker3. The two-channel stereo, 5V power supply can output 5W + 5W power, directly drive 4, 8 speakers, output power, full of energy, good sound quality, with left and right channel volume adjustment.4.unique non-LC filter Class-D digital power board, it can be used directly for the USB-powered from computers.5. dual-panel wiring and proper solution to potential balance and channel crosstalk caused by the wiring between6. ultra-miniature design, it can easily be placed in a small space inside a variety of digital products, high amplification efficiency.7. Solder by machine8. The rated working voltage 2.5-5V, limit operating voltage 5.5V
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