Specifications:Name:500ml Large Capacity Diving Enthusiast Diving Oxygen Tank Breathing Oxygen CylinderModel:B91492Material:Aviation AluminumColor: Grass Green, Yellow, BlackCapacity:500mlAir Capacity: 3.0 Cu.Ft / 85 LittersMax. Pressure: 3000PSI / 200bar / 20MPaMax. Dwell Time Underwater: 10minsNumber Of Breaths: 57 TimesInflatable Way:1.The Big Oxygen Bottle Inflates It2.The Electric Pump Inflates It3.Hand Pump To Inflate ItProduct Size:Approx. 29.4x 5.8x 2.5cmProduct Weight:Approx. 710gApplication:- For diving for entertainment,Diving for trainingFeatures:- The 0.5L oxygen cylinder allows the diver to stay 7 meters underwater for 6-10 minutes (depending on individual lung capacity and depth of diving), perfect for beginners.- Compact portable and lightweight- Portable design, simple operation- Press and hold the top to vent the pressure inside the bottle- Refillable by hand pump- Breathe underwater with total freedomPackage Included:1 x Diving Oxygen Tank2 x ApronPreventive Measures And Warnings:1. This product is suitable for recreational diving within 10m. Do not attempt to use it as an air supply in deep water.2. This product is suitable for waters above 10℃ Celsius.3. The recommended maximum rate of rise is 15m per minute (the last 6m requires 6m per minute).4. Do not carry products with signs of damage, leakage or poor performance.5. The maximum filling pressure of this product is 3000 PSI. Gases with oxygen content greater than 40% cannot be used. Use clean, dry comp