Wireless Tattoo Pen Kit Dual Battery 2000mAh Colorful Display LED Rotary Tattoo Power Supply Pen Green Item Type: Rotary Tattoo Power Supply Pen Material: Aluminum alloy, electronic components Battery: Built in lithium battery 2000mAh, supporting lithium battery 2000mAh Tattoo Pen Size: Approx. 125 x 39mm / 4.9 x 1.5in Replacement Battery Size: Approx. 57 x 33mm / 2.2 x 1.3in Speed: 10000rpm Voltage: 4-12V Output Current: 1.5A Voltage Adjustment Precision: Short press "+" "-" key 0.1V change, long press fast adjustment Charging Time: 2 hours Use Time: 8-12 hours Structure: Cartridge lithium battery pen structure, built in lithium battery, the battery part can be rotated and disassembled; Display Content: Current voltage, remaining power, operating hours, memory mode, current frequency Needle: Universal market 99% of the tattoo cartridge needle Machine Characteristics: LCD display, long life, support for disassembly. How e 1. Long press the power button for 2 seconds to switch on, 1 second after the restoration of the voltage before switching off and in standby mode, such as the need for work Please click the power button to start, and then click the power button to pause the work, every time you start there is a default 0.25/10V strong start after the Return to the display voltage. 2. Click +/- key to increase/decrease the voltage, long press +/- key to increase/decrease the voltage quickly. 3. Timing:timing starts when there is current output, the corresponding timing icon flashes, and the timing icon stops flashing when there is no output. The timing icon stops flashing when there is no output, and the timing time can be cleared by manually switching off the power. 4. voltage memory: the machine has M1 M2 M3 3 groups of memory voltage, in the standby state click on the + / - key to adjust the memory The machine has M1 M2 M3 3 groups of memory voltage, click +/- key to adjust the memory in standby mode, and the memory voltage can be adjusted and saved automatically during the starting process. 5. Long press the power button for 2 seconds to manually switch off the machine, no output within 5 minutes automatically switch off the machine. 6. The power icon shows the charging status when charging, and the power shows full when full, and at the same time, it enters the overshoot protection.