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PCB board pads are enlarged and sprayed with tin, easy to solder, and multiple soldering pads are not easy to fall off. 0000:Ta-ta-ta sound. It is a kind of electronic toy, can also be used as a doorbell or alarm, etc.
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.