È un ottimo laser, il servizio di Elisa è stato eccellente. Grazie

 This product stops working after repeated use, and even if you try to repair it, it will continue to be unstable. Due to repeated breakdowns, the burden of time and！ cost increases, and because the parts are expensive, the cost of repair often exceeds the market price. As a result, it causes trouble for customers and can result in losses. I feel that improvements are needed in product stability and support.