Tacktick Wind System. Package Contains: T112 Micronet Analogue Display, T120 Micronet Wind Transmitter , T112 Micronet Analogue Display, Multifunction digital analogue display for the Micronet system. Shows Apparent or True Wind Speed and Direction along with CH/VMG, GPS and Heading Information. T120 Micronet Wind Transmitter, For the first time, you can have wind information without running cables down the mast. The Wind Transmitter measures Wind Speed and Direction and sends data to any Micronet display via wireless link. It can be fitted (simple three-screw attachment) with the mast in place and makes un-stepping the mast easy too. Calibration for wind speed and direction is done at any display..