Check the listing for details. Scuba Diving Ventilator Tankless Diving System Portable & Rechargeable. Condition: New with tags. Listed at 588.00 USD. Item Specifications: -33 feet top depth -3.5 hours of endurance -Electricity: 70Ah -Product weight: 7kg Product List: -Air Compressors -Regulators -Activated carbon filter -Charger -Belt -Second Stage Regulator The working principle of the Diving System is to transport the air on the water surface through the compressor. The powerful compressor can provide 50L/Min of air for 10meters (32.8 ft) of water. Battery can work continuously for 3.5/5 hours. Whether you are an ocean explorer, treasure hunter, underwater photographer, boat owner, kayaker/paddle boarder, or looking for the latest diving toys – the tankless diving system is for you. The Upgraded battery-driven compressor can provide 57L of oxygen per minute. Allows you to breathe freely underwater and provides you with sufficient oxygen.