MMA bar box mod rainbow yellow

MMA bar box mod 

Features：

• Digital screen -- Battery percentage display 

• Oil level Indicator visible 

• USB-C charge at side 

• Pre-heat function 

• Variable voltage 2.5V-3.2V-3.7V 

• Fits with 0.5-1.0ml cartridges

• Auto flow

• Big battery capacity : 650 maH

Instruction：

• Press 5 times quickly to power on/off

• Press 3 times quickly to change voltage

• Press 2 times quickly to start pre-hearting