Race Master System offers you all of the benefits of the Race Master but can comes with a Micronet Hull Transmitter to provide boat speed and depth data. The System can then be further extended to allow the addition of Wind and GPS information as well as compatibility with the complete range of Micronet Displays. Features:- No wires, or connections to make.- Solar powered (300 hours autonomy).- Twin displays with super-large digits.- Backlighting (3 levels with auto shut off).- Battery level indicator.- Totally waterproof (submersible to 10m).- Shock resistant.- Lightweight.- Full calibration.