Electrically powered, air-fed, constant-flow respiratory system device

Features : Charging time: 3 hours Working time: 7 hours Charger voltage: 110V / 220V Air supply flow rate: First speed: 62 L/min Second speed: 74 L/min The included fresh air respirator system is equipped with a portable power source to primarily overcome problems such as high air intake resistance, breathing difficulties, etc. This system uses an air pump to deliver air to the face covering. You can attach the air pump to your waist, so you are closer to the air source. The charging time is 3 hours, and you can use it for 7 hours on a fully charged battery. The cartridge comes with the unit and can filter a variety of harmful gases. Includes: 1 x Air Pump, 1 x Full Cover, 1 x Air Hose, 1 x Box, 1 x Charger