LED Bike Tail Lights - 2 Clip On/ Strobe Bicycle Rear Safety Lights + 2 Armband Bracelet for Walking, Running, Jogging, Runners, Cycling - Flashing Visibility for Your Bicycle, Dogs, Pets, Backpack SUPER MINI - 56mm * 28mm * 18mm LIGHT WEIGHT - 20g/0.7oz RAIN PROOF - Rain or shine, summer or winter - any weather condition, any time 3 Bright RED LED - Easy to turn on and off with two eye-catching lightning modes - steady and strobe (flashing). 2 INSTALLED CR2032 Battery - Last up to 96Hours (strobe mode) or 72Hours (steady mode)