Battery Pack (With RCA)

Battery Pack for most Rotary Tattoo Pens
With display

Power parameter：
lithium battery
Charging time: 2 hours
Working voltage: 3.7V

Fully charged and fully powered for 4-6 hours

Output voltage:
1 Level: 5V ,
2 Level: 5.5V ,
3 Level: 6.0 V,
4 Level: 6.5V,
5 Level: 7 V.