Switch your game up and experience ultimate versatility with the Mast Lancer wireless tatoo pen machine. Enjoy the different feeling. Mast Lancer machine is equipped with an LED screen, which is beautiful and can protect your eyes. The LED screen can clearly see the details of the adjustment voltage, each increase is 0.1V,which can accurately control the machine. The stroke of the machine is 4.2mm, which is suitable for multiple styles, especially suitable for lining. Mast Lancer wirelss machine can meet a variety of needs. Adjustable needles length from 0mm up to 4mm. Machine come with 2 replaced batteries. When one of the batteries is out of power, you can put it in the charger for charging. It only takes 2-3 hours to fully charge.After it is fully charged, it can be installed in the machine again. The replacement battery pack can ensure that your machine is ready to use.Specifications: Machine Weight: 158g Battery Weight: 34g Length: 129mm Diameter: 30mm Stroke Length: 4.2mm Motor Speed: 10V/10500 Rpm Battery Capacity: 1500mAh