Yunseya Variable Voltage Battery

Variable Voltage Battery - 3 voltage Output modes

 ----- 3.0V(Red Button)

 ----- 3.6V(Purple Button)

 ----- 4.2V(Blue Button)

(It defaults to 3.0V when starting; press the button 3 times successively to 3.6V,again 3 times turn to full voltage output 4.2V)

The LED of the rear end indicates battery power

Compatible with all 510/eGo system atomizers