The MAST U1 Wireless Battery is a compact power solution designed for tattoo and PMU machines with an RCA connection. It allows artists to work wirelessly while providing straightforward voltage control, clear battery-level indicators, and built-in protection features for reliable everyday use.

The battery offers an adjustable 6V–11V output, allowing you to quickly cycle through voltage settings using the power button. A convenient voltage memory function recalls the last-used setting when the unit is switched back on, while the start-up function briefly delivers 10V for 0.02 seconds to help initiate machine operation.

Five LED indicators display the remaining battery capacity in 20% increments from 20% to 100%. During operation, the indicators automatically switch to battery-level display with a breathing-light effect, while charging indicators show the current charging status.

With a 1200 mAh capacity, the MAST U1 provides approximately 6 hours of use and takes around 3 hours to fully charge when used with a charger rated at 1A or above. Built-in output short-circuit protection and input charging protection provide additional safety during operation and charging.