Sea-Dog Round OLED Temperature Meter Fahrenheit w/6 Lead [421610-1]Round OLED Temperature Meter Fahrenheit with 6' Lead OLED (Organic LED) Temperature Meter is designed to withstand constant vibration and the rigors of a wet marine or dusty outback environment. Monitors temperature on a bright, waterproof, daylight readable OLED screen. High contrast and resolution make this screen visible from a wide viewing angle, even with polarized sunglasses. Reverse polarity protected. Same compact round size as a standard 12V