... of any big fails, we will send you a new machine.3. Within one year, if you send back the ... 4. After one year, we offer to repair the machine, but we quire for the cost of the changed parts ... Additional:We can provide OEM service,. we can produce the machine with your brand, with your requirement and color, etc ... anything unclear, please contact me.Sophia Output Frequency: 10MHZ RF skin lifting equipment