... or any flat surface. Use it anywhere you need a USB port, jeeps, rock buggies, motorcycles, boats, trucks, cars, UTVs, ATVs ... Directly To 12 Volt DC System (Input: 12 Volts DC +/-4)Reduces Power To USB Power Requirements (Output: 5 Volts DC +/-0.25 and ... An Extension CordCan Be Used For Charging Or Powering Most USB DevicesCell/Smart Phones, Portable Media Players, Tablets, Readers, GPS, etc ...