Item Specifics. Color: As the picture shows. Charging time: 3 hours. Working time: 5-7 hours. Air supply flow rate: First gear 62 L/min, Second gear 74 L/min. Notice: Not included filter box. Supplied fresh air respirator system is equipped with portable power source mainly overcome the problems of big air intaking resistance, difficulties in breathing and so on. This system use the air pump to transport the air to the mask. You could fix the air pump on your waist, so you are more close to the air source. The canister comes with the unit can filters a variety of harmful gas. 1 set of Full Face Gas Mask – Not included filter box. Computer monitors display colors quite differently, the color of the article may vary slightly from the pictures above. Please allow 1-2cm differences because of the manual measurement. The images are for reference only. Please take the item you get as the standard. If you are unsatisfied with the item received, please offer us relate info for confirmation before returning. The return item need to be kept good considion with the original packing and relate accessories. Good Communication Always Solve Problems. Please contact with us for any problems and solutions. Please kindly notice that our working time is 10:00-18:30 GMT+8, Beijing time. Excluding Weekend and Public Holidays. Enjoy your shopping in our store.