Optimal illumination of roads & streets: front light with a Cree XPE high-performance LED & an optical reflector. Optimal visibility: with 3 LEDs on the left, on the right & in the middle the rear light gives off light in a 220° angle. Front light with 2 light modes: full power & energy-saving mode. Batteries Included: Uses 3x AAA Batteries for front light & 2x CR2032 Lithium Coin Batteries for the rear light..