SPECIFICATIONS Commodity Quality Certification: ce Material: aluminum Gun Type: Electric Type: Tattoo Gun Number of Pieces: COMBO Model Number: EM155 Type: Tattoo Machine Kit Color: Black Operotion Voltage: 7-11 V Drive: Coreless motor Needle Stroke: 0 - 4.5 mm Needle Length: 3.5 mm Connector: 3.5 jack RCA Product information: Machine Operotion Voltage : 7-11 V Drive : Coreless motor Needle Stroke :0 - 4.5 mm Needle Length : 3.5 mm Connector : 3.5 jack RCA Package : machine 1 Cord 1 Some O-rings Battery(P199) Working Voltage : 3.7 V Battery Type : lithium battery Battery Capacity : 1500mAh Output Current : continuous current 0.5 A Charging Voltage : DC 5 V + 0.2 V Charging Current : 800 mA Battery(P155) Interface:RCA Adjustabe:5V-12V Charging Voltage:DC5V Charging Current:800MA Connector:USB-C Lithium Batter:1600 MAH Features: Applicable to: Most tattoo needles on the market, the comfortable handle design is more ergonomic. Usage: Adjustable, simple operating system, one tattoo pen can solve most problems. Package includes: 1Set Tattoo Machine