Package include: 1pc mast tour max,2pcs mast U1 battery（Color Random）, 20pcs Cartridges, 1pc bandage Needles Depth: 0-4.0mm. Stroke Length: 3.6mm. this tattoo machine rotary is compatible with all standard power supplies and wireless power batteries. This rotary tattoo pen advanced gear system that smooth, soft, and quiet operation, Ideal healing results. Flexible and lightweight for every style Gently and smoothly transfers ink to the skin; suitable for all skin types.