Ultra Bright & Long-LastingEquipped with high-performance LED chips, this running light delivers up to 200 lumens to light your path and keep you visible from a distanceideal for running in the dark. The Red Strobe Mode provides extra visibility in emergencies or low-visibility conditions. This running lights offer up to 10 hours of runtime in Red Strobe Mode, 6 hours on Medium Brightness, and 3 hours on High Brightness, giving you reliable lighting for your evening walks or runs USB Fast ChargingThis running light features upgraded USB fast charging and fully charges in just 50 minutes using the included cable. Its built-in rechargeable battery means no more disposable batteries or constant replacements, cutting down on cost and hassle