Dragonhawk Armor tattoo pen machine has a visible LCD voltage screen, easily adjustable voltage. Takes 2-3 hours to full charge, runs for upwards of 8-12 hours, standard 3.5mm stroke length, works as a liner or a shader. Effortless to cover and protect. Efficient cartridges change and replacement. This Dragonhawk Armor wireless tattoo pen has an 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. Random color will be shipped if the one you choose is out of stock.