•The entire body made of aerospace aluminum better resists internal corrosion and stands up well to damage. This air tank is a mini, very strong container that holds large volumes of compressed air •Compared with traditional oxygen cylinders, they are bulky and require a high level of professionalism. The mini oxygen tanks are small in size and easy to carry •Suitable for professional diving backup air sources, fishermen, novice diving, amateur diving, lifeguards, etc. •This product is easy to carry and is an independent respiratory system •Surface hard oxidation and spraying, seawater corrosion resistance for more than 500 hours Specifications: •Capacity: 0.5L •Weight: 1KG •Length: 36.3CM •Diameter: 2.25"LB/5.71CM •Air capacity: 100L (compressed air) •Maximum pressure: 3000PSI/200BAR/2OMPA •Number of breaths: about 170 times (calculated by 0.5L per breath) •Usable time: 5 to 10 minutes (about 170 breaths for surface breathing, about 6 minutes for underwater use at 7 meters) •Different water layers use time: 1~3 meters, about 8~10 minutes; 3~7 meters, about 6~8 minutes; 7~10 meters, about 5~6 minutes Package included: •1 x Air Tank •1 x Storage Bag •1 x Strap •1 x Adapter •1 x Multilingual Instruction Manual •Other items not included