The Prism is a stripped down racing compass. Class legal anywhere an electronic compass is legal, the Prism provides superior accuracy, and a massive display all in an ultralight, compact package. What’s Included: Velocitek Prism Mounting cradle Quick Start Guide EVA storage case 4.8oz / 137 g Heading Repeatability: ±0.5° Display Update Rate: 2Hz (two times a second) Water Resistance: Complete immersion for 30 min. at 3m / 10ft (IPX8) Display: 29.8mm / 1.1” digit height 250° viewing cone Battery: 600mA MASSIVE DIGITS The Prism’s sunlight-readable, high-contrast LCD screen features 29.8mm (1.1”) tall digits in a font that’s optimized for readability. This means that if your boat’s under 40ft long you’ll be able to mount the Prism on your mast and read it easily from anywhere in the cockpit, even if you don’t have perfect vision. ULTRA-WIDE VIEWING ANGLE With 250° of visibility the Prism’s LCDs can be easily read from the helm to the trapeze wire.