ARRIS FPV250 250mm FPV 250 Quadcopter RC Racing Drone RTF With F3 Flight Controller + HD Camera + FPV TX + Radiolink AT9 Transmitter Assembled RTF version, with Radiolink AT9 transmitter and RD9 receiver. Each drone has been well-calibrated and pre-flied. With the most mainstream F3 flight controller, players can adjust flight parameters as needed. Uses high quality S2205 2300KV motor and Falcon 20A ESC. Aim at pursuing the fast speed. ARRIS makes the main power connectors and video tx plug in advance, which make it more convenient for you to connect the wires. Support 3-4S voltage.