MAX Scuba Diving Ventilator Professional Tankless Diving System,Portable Rechargeable Scuba Diving Tank, Waterproof Air Compressor, Swimming Pool Toys Diving Toys, Support 2 Divers (10 Hours)

Has easily breakable parts, air intake hose pipe breaks for any contact trying to let it down to the water. It also has a float on it that is not attached to the unit, it can fall off when putting it in the water. I bought this unit because it had a higher volume but if you have to take a large breath there is a delay in supply start up, a longer hose might help as it is you need to take shallow to medium breath. the weight is stated, and it is heavy, I would have gotten a lighter unit I did not need10 hours of time. one of the hose / regulators that came had a leak. Amazon gave full refund 5 stars to them.