Raymarine Wireless Mast Rotation Transmitter [T221] Boat Outfitting | Trim Tab Accessories Two are required per system

Two are required per system

UPC: 010342050342

Shakespeare Style 4351

and Allen wrench

Raymarine Wireless Mast Rotation Transmitter [T221] Boat Outfitting | Trim Tab Accessories Two are required per systemThis unique transmitter compensates for the movement of a rotating mast to ensure that you get the most accurate wind readings at all times. Operating as a wireless device on a Micronet network the Mast Rotation Transmitter compares compass information from the boat with its own information and corrects the wind angle coming from a standard wind transmitter at the mast head. Features: No wires Solar powered Light weight Quick Guide (pdf)