Check the listing for details. Pro Wireless Tattoo Machine Pen Powerful Coreless Motor with 2 Wireless Battery. Condition: New. Listed at 165.01 USD. Product description： wireless rotary tattoo pen machine has visible OLED voltage screen, easily adjustable voltage. · This machine weight: 180g, length: 133mm, diameter: 32mm. Takes 3 hours to full charge, runs for upwards of 8 hours. · The machine pen has standard 3.5mm stroke length, cordless motor, work as a liner or a shader. Effortless to cover and protect. Efficient cartridges change and replacement. · This wireless 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 skin; suitable for all skin types. Specification： Battery capacity：1800mAh Charging time： 2.5-3 hours Working time：7-9 hours Stroke：3.5mm diameter: 32mm length: 133mm Handpieces weight: 180g Battery weight：150g Working voltage：5-12v Motor Max speed: 12500rmp Package include: 2pcs wireless tattoo battery 1pc tattoo Pen 1pc type-c charging cord 1pc RCA conventer 1pc box FAQ: Q: Can it adjust needle length? A: Yes,rotating click grip. Q: Where do I buy the cartridges for this? A: Any cartridges will work pretty much. But i recommend to buy it from the same buyer. Q: does this have an option for a wireless foot switch? A: Yes, it has a RCA conventer inside, if you don’t wanna work with the wireless power supply, you can use the conventer to connect with the normal tattoo power supply.