[【All-in-One Diving and Snorkeling Set】 GOYOJO Mini Scuba Diving Tank and Snorkel Mask combo features a full-face snorkel mask that can easily connect to a 0.5L scuba tank seamlessly transitioning from surface snorkeling to underwater diving and includes a manual high-pressure pump for easy refilling anywhere. 【Durable Construction and Safe Diving】 Built from robust 6061 aviation aluminum GOYOJO diving tank ensures durability and safety during dives. It is equipped with essential features like a luminous pressure gauge and relief valves for safe diving. 【Crystal Clear Vision and Fog-Free Performance】 Dive into crystal clear waters with confidence. The snorkeling mask boasts a 180° wide field of view providing an expansive and unobstructed view of the breathtaking underwater scenery. Advanced anti-fog technology ensures your vision remains clear and uninterrupted throughout your dive. 【Easy to Use】 GOYOJO mini scuba tank and mask kit is simple to install. Just connect it via an adapter and push it into the mask. The scuba tanks support three inflation methods: manual high-pressure air pump refill adapter and electric inflator. Maximum pressure: 3000 PSI/200 BAR/20 MPa. Please note that our manual high-pressure air pump has the following specifications: Height: 24.2 inches Diameter: 1.22 inches Pressure Range: 0-6000 PSI (0-40 MPa) Interface: 8mm quick connect / American-style nozzle While the pump can fill a 0.5L (approximately 17 oz) diving tank it may take 20-30 minutes to reach 3000 PSI. For faster filling we recommend using a motorized pump. The manual pump is ideal as a backup or for other inflating tasks in case of emergency.]