Raymarine Micro Compass With Strap Bracket T061 The Raymarine Wireless Micro Compass gives you a massive racing advantage. It is light, easy to read, reliable and precise. The Micro Compass's tactical scale gives you clear stable figures for port and starboard tacks. When tacking, the readings are always the same, meaning you never have to remember numbers. Product Information: Easy Installation - A typical installation can be done in just a few hours, with your rig in place and your boat still in the water. And there's no need for holes in the bulkhead or wires down the mast. Self-powering - Solar powered with integrated lithium batteries that power the unit for life. Power consumption is so efficient that units can run autonomously for up to 300 hours. Lightweight - The elimination of wires in the mast not only reduces spar weight but also lowers the boat's centre of gravity, giving significant and immediate performance advantage. Portability - Using clip-in cradles, your display can be placed anywhere on your boat, allowing you to view the information where and when you need it. Waterproof - Sealed for life and completely waterproof (submersible to 10m). This also means no condensation.