70 Adjustable Light BeamTo prevent dangerous injuries,the maximum beam angle of the front lamp can each up to 70 degrees which could meet upward and downward slopes requirements.The light being adjustable on a swivel will satisfy you to see far enough ahead to avoid hazards in the road. USB Rechargeable This running light comes with a micro USB charging cable that can be used after each use to ensure you are always visible when need be. It takes about 5 hours to fully charged via the included micro USB cable which is based on a powerful 2200mAh rechargeale battery. 3 Brightness Lighting Modeschest running light can freely switch the high , low beam, strobe mode by pressing the ON/OFF button.It adopts a 8 red LEDs on the rear to indicate the remaining power and safety warning. The night lights light up the path ahead of you up to 30 meters at night, allowing you to see the road conditions ahead clearly. Lightweight & ComfortableVery lightweight and comes equipped with flexible fastening belt with adjustable length which provide a comfortable fit for most different body types.Suitable for most people use different sizes. Its great for someone who love running,jogging,walking,hiking,camping,finishing and so on. Waterproof & Multipurpose Outdoor IPX65 water-resistant design ideal for outdoor activities,more reliable and durable. The chest running light is adjustable for women,men and kids. Rechargeable LED light lamp is great ideal for someone who loves running,jogging,walking,hiking,camping,finishing,exploring caves and so on.