Sufficient quantity: you will get 2 pieces LED safety lights and 2 pieces extended adjustable straps; Sufficient quantity and nice combination can meet your needs and simplify installation Reliable material: made of ABS plastic and quality LED light, these strobe lights are safe and durable, can be applied with your confidence; Besides, walk light feature with nice weather resistant and water resistance, can be applied on rain or shine, summer or winter any weather condition; Moreover, the bright is enough to make people pay attention, keeping you safe and secure Wide application: these running lights are designed with a waterproof case, allowing them can be attached or clamped onto belts, pockets, backpacks, anywhere on your clothes; They also can be mounted on pet collars, backpacks, helmets and jogging or walking gear Easy to carry: without any tool, strobe running lights are easy to use, install,connect and fasten; Size of a car key and weigh less than one ounce, making them convenient to carry and store 3 Modes of switches: clip lights for running support 3 practical lighting modes, such as full bright, fast flash and slow flash modes; Just press a button, you can perform real-time lighting; All 3 modes can help or warn other passengers, drivers, and pedestrians to find you in the dark or in total USB RECHARGEABLE This bicycle tail light can be charged by USB cable via computers, chargers or portable power banks. This will save you lots of money on batteries. Battery life is great!