High beam - the light beam illuminates the path in front of the runner at a light distance of 25 meters in order to identify possible obstacles or dangers. It's a lot more than the old style.Long battery life - The intensity of the manual light settings is 2: 4 hours at 500 lm (strong light) and 10 hours at 125 lm (low light) to ensure you get the brightness you want with a single button. The rechargeable USB lamp is waterproof, practical, reliable and durable.Visibility of all environments - this is one of the most innovative and effective emergency lights on the market. The reflective rubber bands and the two flashing red LEDs on the back of the battery cover help the driver see the runner and avoid unnecessary accidents in the dark.Comfortable to Wear - Each strap is 4 inches longer than the old style to suit different body types and for the most comfortable state, even for fat runners it is zoomable and durable. The adjustable chest strap with high elasticity allows you to adjust the length and tension of your individual body so that it is held around and does not move, making you feel comfortable and comfortable while exercising.