Don't let dead batteries stop your flying day! This AbleGrid AC adapter is a replacement wall charger for your Spektrum DX8 or DX7S air transmitter (the kind used for RC planes, helicopters, and drones). It replaces the original Spektrum part SPM9551. It comes with a 4-foot long cable, giving you some flexibility while you charge. It's brand new in its packaging. There's a standard California Prop 65 warning. Always good to have a reliable power source for your transmitter to ensure it's fully charged and calibrated for your next flight. Keep this one at your charging station so you never head to the field with a low battery. A simple, affordable accessory that's essential for any serious RC pilot. Much cheaper than buying from the hobby shop. Fly with confidence knowing your radio has full power!