BV Rear Bike Tail Light 2 Pack, Bicycle LED Rear Lights, Easy to Install for Cycling Safety Flashlight SUPER BRIGHT BIKE LIGHT AND 3 MODES ON EACH LIGHT: You can choose your favorite mode for your ridingSteady, Flashing, and Blinking. Visible to motorist over 1500 feet away. EASY INSTALLATION / TOOL-LESS INSTALLATION: Simply mount the quick-release mounts on the handlebar and the seat post of your bike and attach the lights on them. The lights are removable from the mounts. WEATHER RESISTANT: Shine or rain, summer or winterany weather condition, any timeenjoy enhanced visibility and you will be safe at any time of the day. BATTERIES NEEDED FOR THE LIGHT: This light needs 2 AAA batteries. 100% SATISFACTION GUARANTEE: This product is covered by BV USA/BikePakUSA warranty. We are so confident you will love this product that we offer 30 days Money Back Guarantee with 1 year free replacement warranty! Screw the mount onto the seat post Press and hold the quick-release clip Slide the light onto the mount