Blazer’s 24 diodes magnetic LED emergency light has dual function, on or flash mode. It has 2 heavy duty magnets for easy mounting and has a white work light on side for better viewing when in use. Rubber gasket sealed and water resistant and is visible over 1 mile. Dimensions are 6-1/4″ x 3-15/16″ and 1-7/8″ tall. Uses (4) AA batteries, not included