Features and Specs for KBOX Mini-C 50W Mod: Dimensions: 3-1/4\ x 1-1/2\ x 7/8\ (Without Tank) Spring-loaded 510 Contact Pin Wattage Output: 7-50W Resistance Range: 0.3 - 1.6ohm OLED Display Screen Micro Charging USB Port Requires (1) High Amp 18650 Battery (Sold Separately) Magnetized Battery Cover for Easy Battery Access Short Circuit Protection Open Charge Protection Over Use Protection Features and Specs for Subtank Mini-C Tank: Dimensions: 2-1/8\ x 7/8\ (Including Tip and Threads) 22mm Diameter 510 Threaded 3.0ml e-Liquid Capacity Leak Resistant Cup Design Top Fill Feature Symmetric Airflow Slots Adjustable e-Liquid Channel Glass Tank Compatible with the Kanger SSOCC Atomizer Heads (1) Stainless Steel 0.5ohm SSOCC Atomizer Head Included Designed to Minimize Messes when Replacing Atomizer Heads https://www.youtube.com/watch?v=N7W99FGtfPg