Wireless Tattoo Pen Machine Digital led Display Powerful Coreless Fast Charging 1800mAh Lithium Battery for Artist Body Product Details: Product Name: Wireless Tattoo Pen Product size: 145.5mm*32mm Product net weight: 203g Needle stroke: 3.5mm Shell material: aluminum alloy Battery capacity: 1800mAh Charging method: usb interface Working voltage: 5-12V Use time, under the normal 8V voltage condition, the continuous use time is more than 7 hours Versatility: Suitable for most tattoo needles on the market Instructions for use: The device is a tattoo pen with a built-in lithium battery, which can be used directly without a pedal and hook line. It is composed of two parts: 1. The upper half of the lithium battery power supply 2. The lower half of the tattoo pen; the middle part can be unscrewed to replace the upper half of the lithium battery , The specific functions are as follows: 1. Power on: long press the middle ""O"" key for 5 seconds to turn on, and then long press for 5 seconds to turn off; 2. Pause: During normal work, short press the ""O"" key to pause the work, and short press again to resume the working state; 3. Adjust the voltage: adjust the voltage range by pressing the ""+"" or ""-"" key, and adjust 0.5V every time you press it, the minimum voltage: 5V, the maximum voltage is 12V; 4. Battery display: It is displayed on the lcd screen, it is 4 cells when it is fully charged, and it needs to be charged when the last cell is left; 5. Daily charging: external charging port, use Android usb data cable to charge; 6. Lithium battery warranty: one year warranty, the upper half of the lithium battery can be purchased separately for replacement; Power parameters: 1. Input: The device is charged through the usb charging port, and then the lithium battery is stored, the built-in battery is 3 pieces, 600mA/piece, 3.7V battery; 2. Output: The output current is fixed at 2A, and the lithium battery releases the stored electricity through the activation of the switch key, and supplies power to the built-in motor, thereby starting the tattoo pen. Voltage range: (5-12V) Press the ""+"" or ""-"" key to switch the voltage range, 5V is the lowest voltage, 12V is the highest voltage, and the adjustment range is 0.5V each time; 3. Power storage: It can be charged through the matched usb data cable. It can be fully charged in 1.5-2 hours under normal no power state, and it can be fully charged in 4 grids. It can be used normally for more than 7 hours under the condition of 8V, and the voltage is stable. When the last grid of electricity is left, it needs to be charged to ensure the normal use of the next;