[Wireless Tattoo Machine] XNET Bestia Professional Wireless Tattoo Machine Pen Adjustable Stroke 2. 4-4. 2mm Coreless Motor OLED Display 2400mAh Battery for Tattoo Artist

Jump-start: Quickly and lightly pr the For Switch button twi to control the jump-start off and on, green number means jump-start on, blue number means jump-start off.OLED screen display: including timer, Hertz, remaining power display, 4V-12V voltage adjustable, battery capacity is 2400mAh, battery working time is 8-10 hours.Does the display screen look old? No, that's a protective film, just it off. Please don't worry about quality issues