Feature: 1. Adjustable Voltage: 5 to 12V adjustable voltage, adjustable voltage accuracy of 0.1V, to meet the needs of the tattoo artist to operate different parts of the speed. 2. Large Capacity: Built in 1300mAh high capacity battery, fully charged state, can work continuously for 3‑5 hours, do a large area of the tattoo can be used alternately with 2 power sources. 3. RCA Interface: This cordless tattoo power supply is the standard RCA, suitable for most RCA tattoo machines, closed tight, not easy to fall. 4. LCD Screen: With LCD screen, you can accurately view the voltage, remaining power, working time and other conditions, more convenient for tattoo division operation. 5. Cordless Tattoo Power Supply: It get rid of the traditional power supply to use multiple accessories to work, omitting the power cord, tattoo clip cord, foot pedal, so that the tattoo artist work more convenient. 6. Easy to Carry: The cordless tattoo power supply is lightweight and compact, so that the power supply and your tattoo pen into one, the operation is convenient. Specification: Item Type: Cordless Tattoo Power SupplyMaterial: Aluminum alloy, electronic components Interface: RCA interface Battery: Built in lithium battery 1300mAh Power size: Approx. 62 x 32 x 32mm / 2.4 x 1.3 x 1.3inInput: DC5V 1A Output: 5-12V Output voltage adjustment accuracy: 0.1V, long press for fast adjustment Charging time: 2 hours (charging with a charger higher than 5V is strictly prohibited) Use time: Can be used for 3-5 hours. Package List: 1 x Cordless Tattoo Power Supply1 x USB Cable1 x Manual