Notes: 1.Please install it in strict accordance with the instructions and pay attention to the safety precautions inside.For our own safety, everyone needs to have certain diving knowledge before using TUDIVING scuba tank. 2.It has safe depth limit of about 33ft. It can be used as a backup air source for deep diving within 100 ft.The air pressure of the diving bottle cannot exceed 3000PSI/200Bar/20MPA. 3.This product can be taken onto an aircraft, but you need to twist off the breathing valve and release the pressure before removing the valve. 4.Please note that the duration of pumping and use will vary according to the pumping device used, personal vital capacity, diving depth, etc.