Type : Tattoo Power Supply Model Number : Wireless Tattoo Power Supply Fit For : only for Tattoo Pen Machine Feature2 : Fast Charging, Long Battery Life Feature3 : tattoo machine power Interface : RCA or DC interface Working voltage : 6 7 8 9 11V Charging line length : About 120cm Product Name : Tattoo pen Wireless Tattoo Power size : 4*3.6*2.9cm Feature 4 : Tattoo Supplies