This automatic double stage intelligent 12V DC electric pump comes with a digital control and LCD screen to display the set pressure and real-time air pressure. The pump can auto stop at your pre-set air pressure.Easy to inflate and deflate for your demands.Comes with 6 nozzles to fit most air mattresses,inflatables boats,tent,stand up paddle boards etc. Features: Made of premium ABS and PA material for durability. LCD screen display the set pressure and real-time air pressure. Automatically stop once selected pressure reached. Convenient to connects to your car's 12V DC connector. Easy to inflate and deflate for your demands. Automatic dual stage pump rapidly inflate at first stage,then it will automatically chage to second stage to inflate to your selected pressure. Comes with 6 nozzles to fit most air mattresses,inflatables boats,tent,stand up paddle boards etc. Specification: Model: 16PSI Single Stage Pump/ 20PSI Dual Stage Pump (optional) Material: ABS+PA Size: 25.0*17.5*15.5cm/9.8*6.9*6.1in Weight: Approx. 1.20-1.65kg/42.3-58.2oz Support rate: 0-20 PSI Working voltage: 12V DC Power: 110W Max Pumping Speed: 350L/min DC power cord length: 300cm/118.1in Air hose length: 110cm/43.3in Package weight: Approx.1.40-1.85kg/49.4-65.3oz Package List: 1* Pump 6* Nozzles 1* Clip How To Inflate/Deflate: 1.Firstly the air hose connect to the inflation inlet with right nozzle,then connect to your car's 12V DC connector. 2.Press "PSI/BAR" button to select the unit display. 3.Press "+/-" button to set the presure as your demands. 3.Press on-off button to inflate/deflate.