The Captain by iJoy is a 234W TC dual battery mod which includes two iJoy 20700 30A 3000mAh cells - the latest breakthrough in high capacfity, high drain battery technology - and silicone 18650 adapter. A large informative OLED screen displays battery life and amp draw, atomizer resistance (0.05 - 3.0 ohm), and puff counter. Multiple wattage profiles (normal, soft, hard, custom) allow you to ramp the power up or down through the first 3 seconds of firing, and temperature control supports NI/TI/SS. The 510 connection is seated in a 32 x 48 mm deck, making for no overhang with even the largest of atomizers. The soft textured skin is easy to grip, and the large fire button is stiff.