Wireless tattoo pen power supply with builtin 2000mAh battery, designed for continuous use and straightforward operation. The unit combines a compact power source and pen interface to remove cords, clip cords, and foot pedals, delivering a cleaner and more mobile workflow. Key benefits Long runtime: 2000mAh large capacity battery provides 6 to 8 hours of continuous operation on a full charge, suitable for large area tattoos and extended sessions. True wireless convenience: Integrates the power supply with the tattoo pen to eliminate cords and pedals, reducing setup complexity and increasing mobility for chairside or onlocation work. Precise voltage control: Adjustable output from 4.0 V to 12.0 V with 0.1 V resolution, allowing fine tuning for lining, shading, and color packing to match different needle speeds and tattoo areas. Clear feedback and protection: Builtin LCD screen displays the current voltage for easy monitoring. Includes automatic shutdown, overcharge protection, and overdischarge protection to help protect the battery and the device during use. Features and performance Battery capacity: 2000mAh for extended session capability. Runtime: Approximately 6 to 8 hours when fully charged, depending on usage and settings. Voltage range: 4.0 to 12.0 V adjustable in 0.1 V increments for accurate speed control. User interface: LCD voltage readout for immediate visibility of operating voltage. Safety functions: Auto shutdown and protections for overcharge and overdischarge. Practical applications Large area tattoos and full session appointments that require several hours of continuous work without reconnecting to power. Mobile or convention work where a cordless setup reduces trip hazards and simplifies transport and setup. Fine control tasks such as lining versus shading, where small voltage adjustments help achieve the desired machine speed and needle performance. What it solves Eliminates tangled cords and dependence on external foot pedals, streamlining the workspace and improving maneuverability. Provides reliable, longlasting power for lengthy appointments and busy schedules. Offers precise voltage control and visible readout to help artists maintain consistent machine performance across different tattoo techniques. Note Voltage is adjustable from 4.0 V to 12.0 V with 0.1 V accuracy. Battery life and runtime vary with usage conditions and settings.