Wait your battery only holds one cart?? The Duplo holds two.

Take your cart battery to the extreme. The Duplo has all the functionality you've come to expect, including 4 heat settings and a 15-second pre-heat function, unique features like a magnetic magazine cartridge loading system, and the ability to fire your carts independently or simultaneously for big hits. Now better than ever with water pipe compatibility, faster charging, and more!

The improved H2O Version brings to the table an innovative 14mm/19mm male water pipe adapter attachment for extra smooth, water-filtered hits from any two cartridges of your choice. It also has USB-C charging and an all-new "Shift" feature which allows customers to shift from Button Press Mode into Auto-draw Mode for use with less viscous oils.

Features:
• Dual and single cart function
• 4-Setting variable voltage with "shift" button & auto draw
• Included adapter works with 14mm & 19mm Female
• For use with thick oils
• Fast USB-C Charging
• 15 Second Pre-Heat
• 650mAh