Now you'll never lose your work or miss the end of a DVD movie because your battery runs out at 35,000 feet. The MagSafe Airline Adapter will keep your MacBook, MacBook Pro, or MacBook Air juiced throughout your 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). Check with your airline regarding availability of in-seat power ports.Because it's a MagSafe adapter, you'll continue to enjoy MagSafe convenience just as you do at home or work. The magnetic DC plug ensures a tight connection and enables a clean break from the power port if there is undue tension - preventing your MacBook from being pulled off your tray table if someone accidentally trips over the cord.