Walkera Runner 250 Racer In-Line Servo Reverser (Long version) 415mm Cable Length - Signal Type: 760us 1520us (Auto Detect) - FAST FREE SHIPPING FROM Orlando, Florida USA! For: Walkera Runner 250 Racer Fast Free Shipping From the USA! Expedited Shipping Options Available! Buy with Confidence! Also Compatible With: Many | DJI Phantom | Walkera QR X400 | Walkera QR MX400 | Walkera V450D01 FPV 5.8Ghz | Walkera QR X350 PRO FPV | Walkera TALI H500 FPV 5.8Ghz | Walkera QR X800 FPV 5.8Ghz | DJI F550 | Walkera QR X350 PRO | GoPro Hero 2 | GoPro Hero 3 White | GoPro Hero 3 Silver | GoPro Hero 3 Black | GoPro Hero 3 Black+ | DJI S900 | DJI S1000 | DJI S800 | DJI Phantom 2 | Walkera QR X800 | GoPro Hero 4 S... And any other custom application you can dream up!