Used Teradek RT MK 3.1 4-Axis Wireless Lens Controller

The 4-Axis Controller gives you extraordinarily precise control over your lens with 4 mappable axes (knob, slider, 2x wheels) and a rugged chassis that fits comfortably in your hands. Its FHSS wireless system effectively cuts through the toughest interference and transmits latency-free commands over the 2.4GHz band at up to nearly 5000ft (1.5km). Mounted at the top of the controller is an OLED screen with intuitive menu system for calibration and reference, while the back of the controller features a removable Canon LP-E6 battery, which offers up to 36 hours of continuous runtime.