Designed to withstand constant vibration and the harsh marine environment with a bright, waterproof, daylight readable OLED screen. Visible from a wide viewing angle, even with polarized sunglasses. Reverse polarity protected. Injection molded nylon with terminal spade contacts. Fits Sea-Dog^® Power Socket Shell (4261001) and Mounting Bracket (4261051). IP66 rating. A 1-7/16" B 3/4" C 1-1/8" Volts 8-60