MR.ICE Safety Light, Mrice Running Light Flashing Warning Clip for Walking Dog Pets Runner Jogger Small Reflective Gear Night High Visibility (2-Pack) - Blue BATTERY-FREE - Compared with normal LED running light powered by battery, this safety running light powered by your motion, NO battery, NO need to charge. When you run or walk, your motion will be converted into electric energy. It's environment friendly and more endurance. EASY TO USE - There is no switch for power on/off .Just clips on and run.Hook the lights onto your belt, pockets, wrist, arm, shoes, dog collars/leashes, or anywhere else on your clothing. Shake up /down, lights are blinking. STAY SAFE - The safety light is designed to make you be seen in the dark. 15Lum*6pcs led lights, Extra Bright, ideal for morning and night runner & walker. Mrice safety running light will be an effective way to ensure runners can be seen in low visibility enviroment to protect life. RUGGED DESIGN - Colorful detachable silicone case for IPX8 waterproof levele under any weather condition to make sure securety. Only 28g for each safety light, extral light for carry. WHAT YOU GET - 2x Running Light (1 set), 2x Waistband straps (for mounting the lights) .Wearing two or more lights gives the runner total illumination.