[3 lighting modes and 0-20M viewing distance] 3 settings for cool white light intensity (low/high/flash) for every situation. This traffic light can project up to 250 lumens of LED lights in a 0-20 meter field of view. You can change this by pressing the red button. [USB Rechargeable] The running light is built-in 2200MAH USB rechargeable battery, charging time: 2-3 hours charging time . Operating time: Light mode: High (4h), Low (8h), Flash (15h). With the battery indicator, you can better estimate the battery life when using this traffic light. Comes with a USB cable that easily connects to any USB port. [IP45 Waterproof] IP45 waterproof design makes this traffic light ideal for outdoor activities, more practical, reliable and durable without worry about rain. [90 Adjustable Beam] The 90 adjustable beam design perfectly meets the needs of runners for illuminating ground, slopes and other complex terrain conditions. LED running light is used for a wide range of activities including running, jogging, hiking, fishing, camping, climbing, cave exploring and other outdoor adventures. [Reflective Tape Adjustable] With the high elastic strap, you can adjust the length and tightness to your body so that this running light stays in position around your body and does not move. It is designed with a noticeable reflective fluorescent mounting strap to make it easier and clearer to see (obstacles on the road) and (by other people) in the dark, and gives you complete protection.