Feature:1. Experience the fun of diving but what if want to dive in the sea and don't have professional equipment? With a small diving cylinder, novices can dive and feel the charm of the sea; 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!2. The 360° one‑stage rotating valve head can effectively prevent the winding damage of the medium‑pressure pipe and effectively reduce the potential hazards. Equipped with a master valve control switch, open to maintain gas during inflation and breathing, and close the valve to avoid gas leakage if it is not used up. The gas is recommended to be used up within 48 hours.3. The pressure relief valve on the top of the breathing valve can release the pressure, release the air, and vent the pressure; one‑way filter, double filter design, breathe pure air; luminous waterproof pressure gauge, it is still clearly visible at a depth of 80 meters.4. Silicone mouthpiece, dust‑proof high‑precision filter, made of food‑grade silicone material, odorless, more consistent, and non‑cracking. Imported rubber can effectively prevent leakage, and imported waterproof rubber is air‑proof, water‑proof and safer. Professional custom‑made dust caps the intake nozzles and prevent bumps from affecting performance.5. Adult diving goggles adopts liquid silicone goggles with PC lens glass design. The seamless joint does not need to worry about water seepage and seawater corrosion. The adjustment button can adjust the length of the goggles according to the size of the individual'