Hand Controller Battery GripThis version For Cartridges is dedicated to rotary tattoo machines, coil machines are prohibited to useThis version For Needles is dedicated to coil machines, rotary tattoo machines are prohibited to use 0.2s Instant start-up, smaller and lighterFully charged in 90 minutes can work continuously for 3-4 hoursOne-handed control more freelyThe hand controller battery grip is completely replaced( traditional power box, grip, cord, and foot pedal)voltage Adjust, Power display, Voltage display, Current display, Switch buttonFully charged in 90 minutes can work continuously for 3-4 hoursMultiple optional combinationsThe optional connecting line is RCA, DC. Suitable for most workplacesWrap the small transparent covers bag around the handle before useRemarks: If the load current is too high when the tattoo machine fails, the circuit board will automatically shut down within 3 secondsPower failure protection, recharge to restart.It is forbidden to soak in water, avoid high temperatures, smash it, and disassemble it.Specifications:Grip Weight: 104gGrip Diamater: 32.5mmBattery Capacity: 1300mAhVoltage display: 4V-12V