4 Lighting modes: these safe LED lights have 4 lighting modes, including white, white strobe, red, red strobe,; They are great accessories to keep you safe in the low light conditions at night. USB rechargeable: these safe LED lights are USB rechargeable with lithium battery built in, which can hassles to replace batteries frequently; You can plug them into most USB cables and charge from laptops, cars, wall sockets and so on; It only takes 2 hours to fully charge and has up to 15 hours of battery life under the strobe mode; Note: if the product is not bright or the brightness is low, please charge the product before use. and compact: these bright safe LED lights weigh only 16 g, very light and compact that It's like you're not wearing anything; The outer plastic shells are waterproof so that you can go outside running or cycling in rainy nights as normal. Convenient to use: there is a clip on the back to clip the light on cloth, dog collar and other items; It is also equipped with a silicone strap so that you can mount the light on suitcase, backpack, bicycle and other items; These running lights are very easy to use; Short press the power button to turn on or change the lighting mode, long press to turn off. A wide variety of applications: these USB rechargeable safe LED lights are suitable for many occasions; They are great night partners for runners, joggers, cyclists, climbers, dogs and much more; They release your hands for other activities without the need to hold a torch. Colour: black Material: plastic Size: Single size about 46x30x20mm Package Contents: 6 * Tail lights 6 * Straps Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.