MAX Battery Vape Pen is a vaporizer pen battery featuring 380mAh, 510 thread, pre-heating, and adjustable voltage for thick or thin oil cartridges with magnetic micro USB charger in box. 
Specs and Features for MAX Battery Vape Pen:

Battery Size: 380mAh
Industry standard 510 Connection
Comes with a USB charging cable
Adjustable voltage
Preheat option

Directions:

5 Clicks to turn on/off
3 Clicks to adjust voltage:

Red 3.6v Blue 3.1v White 2.7v

2 Clicks to preheat hold for 15 seconds

Package Includes:

1 x Max Battery Pen
1 x USB Cable