GoolRC 5.8G 600MW TX40 40CH AV Transmitter for QAV250 QAV280 Racing Quadcopter

Features:
This is 40-channel transmitter of 5.8G 600mW A/V wireless system.
40 channels: Cover A, B, G, D and E bands.
Digital phase-locked loop circuit, no channel drift issues.
Wireless transmission distance up to 800 meters without any obstacles and interfering signal( Actual transmission distance depends on specific environment).
Small size, light weight, easy to carry.