With the MagSafe Airline Adapter, you'll never again worry about losing power while traveling. Just plug it into your airline seat power port and keep your MacBook, MacBook Pro, or MacBook Air computer powered up for the entire flight. Sleek and light, it works with in-seat DC power ports available on many commercial airliners - both EmPower ports and 20mm ports (using the included adapter). The magnetic DC plug ensures a tight connection and enables a clean break from the power port if there is undue tension - preventing your notebook from being pulled off your tray table if someone accidentally trips over the cord.