This is a Portable Battery Operated Light-Bow with 2 Colors lens that act as Green Starboard and Red Port lights. This portable light uses the heavy duty suction cup mount and it is easy to use. It can be used as an emergency back up light. This durable light requires TWO (2) "D" Cell Batteries. The batteries are not included in the package. Simply press the button after putting batteries and it will work. Material: PLASTIC, Bulb Type: 3W Incandescent Bulb Dimensions: 7 1/2"(L) X 3 3/4" (H) This is a Portable Battery Operated Light-Bow with 2 Colors lens that act as Green Starboard and Red Port lights. This portable light uses the heavy duty suction cup mount and it is easy to use. It can be used as an emergency back up light. This durable light requires TWO (2) "D" Cell Batteries. The batteries are not included in the package. Simply press the button after putting batteries and it will work. Material: PLASTIC, Bulb Type: 3W Incandescent Bulb, Dimensions: 7 1/2"(L) X 3 3/4" (H). This is NOT an LED light construction. Item: PG040600