Revolution of the structure: The battery of the Mast Rider machine aims to shorten the length of the machine as it is placed under its grip. The shorter length provides a better feel and makes it super lightweight. Being only 112mm in length and 151g in weight, it’s more comfortable to use and operate while tattooing. Its battery rating is 1520mAh, giving a working time of 4-6 hrs and a charging time of less than 3hrs. The machine features an LED screen to protect your eyes. It also displays the voltage and battery capacity timing on the screen. The shell is made of aluminum alloy. The 3 buttons on the machine are used to increase and decrease the voltage and start/pause the machine, respectively.