The Rock by Boulder:
The Boulder Rock is a refillable pod based system. Unlike many other pod based systems that force the user into pre-filled cartridges, the Rock allows the user to choose their own e-liquid. Also equipped with a manual fire button to provide a superior hit over automatic devices. A built in USB charger is attached at the bottom of the Rock for convenient cable free charging. 12 Devices Per Case.
Specifications:
Built-in USB charging
360mAh battery
1.5ml Pod Capacity
45 minute charge time
Included:
1 X Boulder Rock Pen
1 X Rock Pod (Pre-Installed)