We Youlisn is a professional& innovative sports recovery equipments manufacturer from US with factory located in Shenzhen,which specialized in vibrating massage guns、mini vibrating massage gun、vibrating massage balls、vibrating foam rollers and so on.1）Our massage guns are originally patented designed with patents in China/ EU and US；2）Our massage gun's battery is power lithium battery which can complete charge-discharge 500 times, the massage gun can work more than 8 hours with fully charged;3）The massage gun Y500/500S have more different model, which simulate the hand-massaging of speed up and speed down circulation in different speed levels,this is ours unique character and most others don't have. We applied 6 QC processes in the whole production procedure to ensure the product quality, including IQC incoming inspection, motor's inspection, production control to finished product inspection, aging testing, pre-packing inspection, pre-sealing inspection and so on.  All of our items have certificates like FCC/ FDA/UL/ CE/ Rohs/ PSE and so on, other certificates are also available according to customer's request.