Feature:1. Experience the fun of diving and want to dive in the sea. What if you don't have professional equipment? With a small diving cylinder, novices can dive and feel the charm of the sea;2. Lighter and more comfortable, refuse tedious equipment, and easily feel the charm of the sea. diving free breathing equipment provides you with a better diving experience!3. The pressure relief valve on the top of the breathing valve can release the pressure, release the and release the pressure by pressing it down. One‑way filter, double filter design, breathe pure air. The luminous waterproof pressure gauge is still clearly visible at a depth of 80 meters underwater.4. Silicone mouthpiece, dust‑proof high‑precision filter, made of food‑grade silicone material, odorless, more consistent, and non‑cracking. Portable oxygen cylinder storage bag + strap, plus anti‑lost rope, not afraid of falling when diving, easy and labor‑saving and safer.5. Imported rubber can effectively prevent leakage, and imported waterproof rubber is air-proof, water-proof and safer. Professional custom-made dust the intake nozzles and prevent bumps from affecting performance.How to Use:Usage details: The pressure of the oxygen cylinder should not exceed 20 MPa (that is, 200BAR or 3000PSI displayed on the pressure gauge); before carrying on the plane, please separate the breathing valve from the bottle body; you need to press the top to r