Wireless Tattoo Battery Pack, Rechargeable Cordless Tattoo Power Supply Portable.RCA Lithium Battery Pack 1500mAh Capacity with LED Digital Display for Tattoo Pen Rotary Tattoo Machine WB11-A This is a universal fit and fits with most tattoo pens. New in the Box Portable - This is a wireless tattoo power battery pack. It can help you break free from the constraints of cables. This power supply has only 59g and will not burden your hands, allowing you to create tattoos without restraint Reliable Battery Pack - The battery capacity of this power battery is 1500mAh. It can work for 3-5 hours after being fully charged. The output voltage of this tattoo power supply is 4-12V, which can be accurate to 0.1V. The standard-size RCA connection is sturdy and durable, suitable for most tattoo pens with RCA interfaces on the market Jumpstart Mode - This wireless tattoo power battery pack is equipped with a jump-start function. In the jumpstart mode, it will start at 10V, and then load to the last memory working voltage in this mode. This function is suitable for tattoo pens that require high-voltage start-up Dot Work Function - This multifunctional wireless tattoo battery allows artists to create dot-based artwork. And it has 60 levels for you to adjust. Integrating normal mode and dot mode into one wireless tattoo power supply, unleashing your creativity and improving efficiency Timing function - This tattoo power supply has a timing function, accurate to the minute. Double-click the power button to reset the timer. You can know how many minutes it took you to do a tattoo. For artists, this feature allows them to know how much time they have invested and how much return they should receive