Bell, Quasar Bike Light Set, Headlight: High Powered Philips Xenon Bulb With Optimized Reflector & Clear Lens, Large Side Portals Provide 180 Degrees Of Visibility, Weather Resistant Cabinet, Easy Battery Access, Tail Light: 3 Bright Red LEDs, 2 Modes (Constant On & Flash) Requires 4 "AA" & 2 "AAA" Batteries, Not Included.