This machine is very rugged and dependable and easy to maintain. I use mine daily up to 10 hours a day and almost never have any problems with them. I keep the screws greased on top of it. Otherwise water can corrode the screws making it very difficult to take apart when its time to replace the gaskets and rings. Product Feature DAVV SCU70 12V 160W Oil-less Pump with 50 Foot Hose and Respirator, Hookah Dive System Compressor is an ideal choice for snorkling. It’s diaphragm air compressor, compresses atmosphere air go to pressure 2.5 bar, after be purified and separated by the filter and separator. Product Specification – Discharge rate: 136L/min – Voltage:12V DC – Power: 160W – Lubricating Oil: Oil free – Suction pressure: atmosphere – Working pressure: 2.5bar – Media: air – No. Of stage and cylinder: 2 – Cooling: Air cooled – Driven: Belt driven – Shout downManual stop – ProtectionSafety valve – Noise: Less than 60dB(A) – Dimension: 320 x 125 x145 mm / 12.6 x 4.9 x 5.7 inch – Weight: 5 kg / 11 lb. Product List 1x Electric Pump 1x 50 inch Hose 1x Respirator. The motor have overheat protection device, when it rise to a certain temperature, It remains the same. But we usually advise customers not to use it too long, it is best to use a period of time after a break, this can extend the life of the motor. The item “Oil-less Diaphragm Pump System Compressor Third Lung Serface Air 12V 160W Hookah” is in sale since Saturday, July 28, 2018. This item is in the category “Sporting Goods\Water Sports\SCUBA & Snorkeling\Other SCUBA & Snorkeling”. The seller is “fesin2018″ and is located in CA. This item can be shipped to United States.