Features Package 1 Tattoo Pen, 1 Extra Battery, 1 Charging Base, 1 RCA Connector, 1 Type-C Fast Charging Data Cable, 1 Professional Manual Voltage 5~12V Battery Capacity 2000mAh Motor Coreless Motor Motor Speed 12V/10000 Rpm Stroke Length 2.6 /2.8 /3.0 /3.2 /3.5 /3.8 /4.0 mm Support Working Time 4hours/Battery Charging Time 1hour 30mins/Battery Connectivity Wired/Wireless dual mode Wired mode connect interface RCA Grip Diameter 31mm Weight tattoo pen weight-230g, battery weight-75g, charging base weight-87g Suitability Compatible with most tattoo needle cartridges on the market Explore more about OG PRODUCE Dark Knight Wireless Tattoo Pen HIGH CAPACITY BATTERY 2000 mAh battery support artists to creating the tattoo reach to 4 hours. WIRED/WIRELESS DUAL MODE When the battery is discharged, the RCA connector can be replaced. SIMPLE OPERATING SYSTEM The LED screen clearly displays the battery, time, and voltage. Artists can easily adjust the voltage by pressing a button. PROVIDE QUICK GEAR ADJUSTMENT AND ARCHIVING FUNCTIONS Long press the M button to save the gear, and fast press the M button to switch gears (A, B, C 3 kinds of gears can be adjusted). During the creative process, adjust to the desired gear in a timely manner to improve tattoo efficiency.