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So that the board won't burnt down by material short cut. The entire board is coated by high quality transparent heat-shrinkable sleeve,making the PCB in insulation state from outside. Support WIN7,Vista,XP system.
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.