What are the design features?

Features a protected, cartridge drop-in design
The top transition module will accommodate cartridges < 10.8mm (inner diameter) for Gen 1 and < 11.5mm for our Gen 2 (marked with a '+')
Fits most 510 thread cartridges (included cartridge is non-functional and for merchandising purposes only)
3-LEDs indicate battery life and power settings
Three (3) power/voltage settings (Low 2.8V, Medium 3.2V, High 3.6V)
USB magnetic charging port + cable
Dimensions: 4.3"L x 0.5"D
One (1) year limited warranty
Patent Pending