【UNIQUE DESIGN】:S400 pro mini scuba tank uses an extension tube to connect to the pressure gauge, which is more convenient for us to check the pressure gauge when diving. At the same time, our original messenger bag has been changed to a waist pack bag. You can easily carry it and free your hands to do more things underwater. 【LARGER CAPACITY BUT PORTABLE】: SMACO mini diving tank has a capacity of 1L and can breathe underwater for 15-20 minutes. At the same time, the scuba tank has three-layer filtration device, which effectively prevents the entry of dust and impurities, making the inhaled gas cleaner. (Attention: Diving depth, temperature, and breathing rate will affect the use time of the scuba tank.) 【BOARD THE PLANE】:After you disassemble the scuba tank, you can take it on the plane and go diving anywhere. It has safe depth limit of about 33ft. It can be used as a backup air source for deep diving within 100 ft. Mini diving cylinder is suitable for underwater exploration, boat cleaning, emergency rescue, backup air source, etc. Use the 8mm SMACO refill adapter. The large diving tank leads to the small diving tank , the filling time is 8 seconds. SMACO air compressor, the filling time is 26 minutes. Easily solve inflation problems.( The air pressure of the diving bottle cannot exceed 3000psi/200Bar) SMACO high pressure hand pump, the filling time is 35-50 minutes. 【WHAT YOU WILL GET】: Perfect diving packages(include a 1L diving bottle, a cloth bag and a hand pump)