Dragonhawk M4 tattoo pen machine kit is easy to use for all beginners and artists. 30mm grip size, weight: 155g. Custom motor and pen length easy for long hours practice and tattooing.Compatible with all cartridge needles. Ergonomic, lightweight pen-style machine. The M4 features a powerful motor and an advanced gear system that guarantees reliable, quiet operation without any vibration. Rotate the tattoo machine grip to adjust the needle's depth. Strong and powerful, available for shading and lining. Stable operation between 6-9V with RCA cord connection. U1 wireless battery can fit with all RCA connection. Output short circuit protection & Input double charging protection. There is a charging current limit in the battery. As long as it is a charger of 1A or above, the charging time of the battery 1200MAH is about 3 hours, and the usage time is about 6 hours. Dragonhawk extreme tattoo cartridges needles compatible with All types cartridge grips? and pen style tattoo machines. Needle protrusion: 0-4.5mm, Stroke: 3.5mm, 3.5mm jack plug connection. Kit includes: 1*Dragonhawk tattoo pen 1*wireless tattoo battery 50*needles cartridges inks colors ink cups supplies