RCA connector
Length: 3.36in (85.5mm)
Diameter: 1.32in (33.5mm)
Weight: 2.4oz (68g)
Battery: 1600mAh
Adjustment accuracy: 0.1V
This battery aluminium grip include battery, it can let your rotary work alone without tattoo power for more than 5 hours.
It has a LED screen can shows voltage, remaining battery.
Can suit with 99% cartridge needles.