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Chip type: PAM8403 1. Product model: XH-A153. Nano Sheild. Output power: 3W×2. Answer: The function of the power amplifier board is to amplify the signal. There may be a problem with the computer's Bluetooth driver, the version is too old or there are files missing.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.