Specification: Item Type: Tattoo power supply kit Material: Aluminum alloy, electronic components 1. Tattoo Pen Needle: Used for most tattoo cartridge on the market Interface: interface Product Size: Long (without needle): Approx. 124mm / 4.9in Diameter: Approx. 29mm / 1.1in Needle Out Stroke: Approx. 0-3.5mm / 0-0.1in Needle Length: Approx. 1-4mm / 0.04-0.16in Speed: 8V 9000RPM/min (driving the working speed of the silicone cartridge needle, non idling speed) Start Voltage: 5V Working Voltage: 4-12V (with silicone cartridge needle) 2. Tattoo Power Interface: interface Battery: Lithium battery 1300mAh(built in) Power Supply Size: Approx. 62 x 32 x 32mm / 2.4 x 1.3 x 1.3in Input: DC 5V 1A Output: 5-12V Output Voltage Adjustment Accuracy: 0.1V, long press for quick adjustment Charging Time: 2 hours (charging with a higher than 5V is strictly prohibited) Use Time: can be used for 3-5 hours Package List: 1 x Tattoo Pen 1 x Clip Cord 1 x Power Supply 1 x USB Charging Cable 1 x Manual Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.