Self Contained Breathing Apparatus (SCBA) is a positive pressure air breathing apparatus for protecting humans' respiratory system during emergency rescue and relief work. It’s composed of carbon-fiber cylinder, cylinder valve, reducer, medium-pressure tube, fast joint, demand valve, full face mask, high-pressure tube, alarming device, pressure gauge and back pack. It’s MED and CE EN137 type 2 certified. The SCBA is light-weight and easy to operate. Adjustable height backplate, digital pressure gauge, HUD device, EFV cylinder valve and communication device are optional.