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Working mode: power on suction, power off spring force. When DC6V is used, the power is relatively small. When dc9v is used, the power is very good. When DC12V is used, the power is more powerful.
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.