1? Reject the sultry, stuffy and breathe more smoothly? 2? Simple operation, strong portability, breathing is not stuffy, not hot? 3? No fog, clearer vision Face screen, low and long operating sound of the fan Long time to wear without noise? 4? Full Charge once Can work continuously for more than 7 hours at a time? 5? Practical supplied fresh air respirator system? 6? Come with the canister unit can filter various harmful gas? 7? The filter can be used for benzene, chlorine gas, acetone, alcohol, aniline, disulphide, carbon tetrachloride, chloroform, bromomethane, chloromethane, chloride, chlorinated sodium chloride? 8? Use the air pump to transport the air to the mask? 9? Allow to fix the air pump on your waist, so you are more close to the air source. Product Name: Gas Mask Respirator First gear: 62 L/min Second gear: 74 L/min about 5-7h per full charged Fullly Charging time:about 3h Built-in battery: 4000mah Battery Type: 18650 Batteries Pack. 1x Full Face Mask 1x Air Pump 2x Air Pipe 1x Canister filter 1x Recharger 1x Cloth bag 1x Paper box.