HT-781, Max 16PSI 1. Only Air Inflation 2. Single motor, single stage air flow: 70L/min 3. Preset target pressure, automatically stop inflation 4. Power: 110W 5. Working voltage: DC 12V 6. Material: ABS+PA 7. Cable with built-in 12A fuse 8. Widely for inflating SUP, air bed, inflatable boat, Kayak, inflatable swimming ring and more. HT-782, Max 20PSI 1. Air Inflation + Deflation 2. Dual motors, dual stage air flow: 1st stage - Low Pressure and High Flow Mode (350L/min); 2nd stage - High Pressure and Low Flow Mode (70L/min). ( The speed is 350L/min at first, then automatically switches to 70L/min until fully inflated. ) 3. Preset target pressure, automatically stop inflation 4. Power: 110W 5. Working voltage: DC 12V 6. Material: ABS+PA 7. Cable with built-in 12A fuse 8. Widely for inflating/deflating SUP, air bed, inflatable boat, Kayak, inflatable swimming ring and more The car battery clip is optional for you to connect with car battery directly.