Ehpro Armor Prime Mech Mod, constructed with high quality brass, is compatible with a single 20700 and 18650 battery. The Ehpro Armor supports a coil resistance range from 0.2ohm to 1.2ohm. It adopts various protections for a safe vaping too. The LED indicator shows battery life clearly. The Ehpro Armor Prime Mech Mod is definitely an ideal choice for cloud chasers. All-brass construction Power by 1x 18650/20700 (sold separately) Various battery protection for safe vape LED battery life indicator - Red light: power is lower than 30% - Yellow light: power is between 30% to 70% - Green light: power if over 70% Multiple protection - Short-circuit protection - Over heat protection - Reverse battery protection - 10S cut-off protection 510 threading connection Color: Black Brand Ehpro Model name Armor Prime Resisteance range 0.2-1.2ohm Battery Type 1 x 20700/18650 (sold separately) Battery cover Bottom twisted Size 90.5 x 24.7mm