The Mad Mod by Desire is sleek in size and comfortable in hand. Powered by single 21700 battery, the Mad Mod fires to a maximum output of 108W. It is also compatible with 18650 battery. The M-tank features easy top refill and bottom airflow. Just get Mad Mod and you won't be disappointed! 0.96-inch display Powerd by 1 x 18650/21700 (Sold Separately) Easy slipper top refill Adjustable bottom airflow Maximum output of 108W Various battery protection Rebound battery cover design 510 threading connection Brand: Desire Multi-function adjust mode VW/TC-NI/TC-TI/TC-SS/TCR/PMG(Power Multiple Graph)modes Power adjustment range 5-108W Resistance range 0.08ohm-3.0ohm Output voltage 0-8V Output current 35A Tank Capacity 3.0ml Size 149.7 x 37 x 25mm