Usage Tips:Upgraded 120 Degree Adjustable Bar-- This easy-to-use running light can be adjusted to 120 degrees, the widest adjustment angle on the market. This running light fully meets the needs of runners for uphill, downhill and straight roads, to protect your safety and prevent accidental tripping. 500 Lumens & 3 Brightness Levels-- This night driving light has 500 lumens and can light up the 20 meters road ahead. The red screen on the back can warn of the arrival of a vehicle, help the driver to recognize the rider, avoid accidents and fully protect you. 3 lighting modes: high light, low light and strobe. You can change the light mode according to the road conditions. USB rechargeable. --The sports running light is USB rechargeable with built-in 2000MAH battery which can be charged by charger, mobile power, computer, etc. After 3 hours fully charged, the running light can be used in long-distance lighting (4 hours) / low lighting (8 hours) / flash (15 hours) mode. Not only a strip like gift-- fashion during sports. We offered an additional black shoulder strap. Both straps can be combined with different sportswear. Thanks to the highly elastic shoulder strap, you can adjust the length and firmness to your body to keep the lamp in the right position. The rechargeable LED running light weighs only 160 grams, which is very light and does not affect your training. Ideal gift-- This running armband is level 6 waterproof, you so you don't have to worry about rain or sweat. It is very suitable for outdoor sports. It is the best gift for fathers, husbands and friends who love jogging, fishing, camping, mountaineering and adventure.