Optronics BUL11CBXP is for the BUL11 Series. This is a 4" Round Sealed Clear DOT LED Back-Up Light and has 10 Diodes. This light is certified for back-up light function when installed as pair in two-lamp system [SAE (2)R]. This light his 12V and is sonically sealed and waterproof and comes with a two-pin connection.