Feature: 1. Aluminum Alloy Material: Machine body of rotary tattoo pen is made of space aluminum alloy, bright color, sturdy and durable, light weight, no fatigue after long term use. Needle stroke can be adjusted, suitable for 99% of cartridge needles on the market. 2. High Performance: Rotary tattoo pen has a built in powerful motor, and the speed under 8V voltage can reach 9000r/m±10%. Low noise, stable function, not hot after working for a long time. 3. Non Slip Handle: The ergonomic pen machine provides you with a better user experience, can be used for tattoo, eyebrow tattoo, eyeliner tattoo and lip tattoo. 4. Wireless Power Supply: LED digital display, allows you to observe the voltage in real time, you can adjust the voltage according to actual situation. The voltage adjustment accuracy is 0.3V. 5. Fast Charging: Tattoo power supply built in 1300mAh lithium battery, rechargeable design, can be fully charged after about 2 to 3 hours, long endurance. Specification: Item Type: Rotary Tattoo Pen Set Product Introduction: 1. Rotary Tattoo Pen Length (without needle): Approx. 116mm / 4.6in Material: Space Aluminum Alloy Connection Method: RCA connector power supply Applicable Needle: Tattoo cartridge needle Adjustable Needle Stroke: Approx. 3.5mm / 0.1in Working Voltage: 6-9V Working Speed: 8V 9000r/m ± 10% 2. Power Supply Battery: Built In Lithium Battery 1300mAh Connector: RCA Connector Input: DC5V/1A Output Voltage: 4.2-12V (Adjustment Accuracy: 0.3V) Power Supply Size: Approx. 22 x 30 x 67mm / 0.9 x 1.2 x 2.6in Charging Port: Type C Characteristics: Small and lightweight, long endurance, fast charging Note: When the power supply is out of power, according to the current of different charging heads, it can be fully charged for about 2 hours to 3 hours, and it can be used for 3-6 hours after being fully charged. (It is strictly forbidden to use the current exceeding 5A to prevent damage to the power supply) Applicable: RCA connector slider motor machine, coil machine, motor tattoo pen. Package List: 1 x Rotary Tattoo Pen1 x Tattoo Power Supply1 x USB Charging Cable Note: Please allow slight error due to manual measurement. Thanks for your understanding.