Charging time: 3 hours. Working time: 7 hours. Air supply flow rate. First gear: 62 L/min. Second gear: 74 L/min. Notice: Not included filter box. This Powered Supplied BREATHING systems is a positive pressure safety device to make sure no air borne contaminants can enter the air breathing space. This system is for workers who are working in a thin air environment or toxic environment. Place the long air pipe and filter in a clean air area, and the Turbo air pump it will provide a continuous flow of cool clean air to the headpiece or facepiece. The color might be a little different from the actual product due to color display of different monitors. Please allow 1-3 cm error. 1 set of Full Face Gas Mask – Not included filter box. For faraway region or countries (Brazil, Mexico, Peru, etc), the transit time may be longer than Overall Transit Time Frame. Please indicate your personal requirement such as colors, packages, value of declaration etc. At message when you pay to us. Cancellation request should be submitted during this period, Or unpaid dispute will be open automatically. We would try our best to solve your problem. Please note that the return address must be provided by us. We will reject all return of the package without agreement, regardless of whether a return request is filed. All questions will be replied within 24 working hours.