Features & details Super Bright + Long Lasting: Can be easily seen from hundreds of feet away. Ideal for use as navigational, signal, or safety lights. Come preinstalled with batteries that last up to 100 hours of continuous use. (Extra Batteries Included) Lightweight + Versatile: About the size of a car key and weighing less than 1 oz., these lights can be attached to pet collars, backpacks, helmets, and jogging or walking gear. Use the included fasteners to securely strap the lights onto boating bows and sterns, drones, bicycles, arms, wrists, and ankles. Perfect for use as a bike rear, back, and tail light. 3 Lighting Modes + Easy-to-Use: Preinstalled with batteries for immediate use! These lights clip on easily and stay on securely. With one simple push of a button, you have instant illumination with 3 useful lighting modes [Steady, Flash, and Strobe]. Weather Resistant: Perfect for use in rain or snow, daytime or nighttime, and summer or winter. Count on them to keep you visible and safe during any outdoor activity in any weather. Excellent 4-Pack Value + Extra Bonuses: Includes 2x Red + 2x Green GearLight S1 Safety Lights with batteries preinstalled. You also get 4x extra CR2032 batteries (2 sets), 4x straps, and a mini screwdriver for easy battery replacement. Porch-pickup is on Winchester drive, Round Rock 78665.