Dual Cart Capacity- Flip between 2 carts or enjoy both at the same time. Digital Display Convenient, real-time info to stay in-the-know in sessions. Water Pipe Adapter Attach Inspo Dual to your glass piece. Inspo Dual doubles the enjoyment of the fan-favorite Inspo line. With Inspo Dual, you can use up to 2 cartridges at the same time (up to 2 grams). PRODUCT SPECIFICATIONS Battery mAh: 650 mAh Voltage Range: 1.8v, 2.4v, 2.8v, 3.4v, 3.8v Battery Charge Time: 90 min. Atomizer Capacity: 2 gram (2 at once)