CKB Ltd Bicycle Signalling System Wireless Remote Control Bike Indicators - Cycling Gadget LED flashing reflector / Warm yellow LED indicating lights 2.5v Wireless indicating system that allows cyclists to focus on the road while signalling and turning The extra-bright LED light display allows you to indicate left and right clearly, with an extra hazard light option at your disposal. Audible beeps accompany the visual indicators, allowing you to alert those nearby at the touch of a button. Listing include 1x Signal Pod, Bracket & Remote / Requires 3 x AA Batteries (Not included)