New Wireless Tattoo Pen Machine with 2 Power Bolts, Not have E give function

• Output Voltage: 4-12V
• Increment/decrement voltage interval: 0.5 or 0.1V*
• Maximum output current: 1A
• Charger Input: USB-C
• Size: H 130mm x W 38mm
• Weight: 229g (8.09oz)
• Battery Life: ~ 6-10 Hours
(based on operating parameters)