Get ready for unrivalled performance with the Monsters Ink Phantom Wireless Tattoo Machine. Next generation technology, built for professionals. Features 1 year's manufacturer warranty included 1000mAh battery capacity with overload and short-circuits protection High-resolution digital display screen. LED Display Voltage is helpful for accurate voltage adjustment and a better operation experience. The minimum controllable voltage is 0.1v. In addition, the press button screen helps with the sensitive reactions when tattooing Precise drive system - a customised motor with a more precise, longer-lasting, and lower vibration motor Optimal mechanical structure to meet the maintenance and sterilisation requirements, running efficiently and easy to sterilise Variety of stroke lengths – 2 strokes included in the package, 3.0mm and 4.0mm stroke cams. That means you have 3 options including the originally installed strokes