Knuckle Lights Rechargeable Handheld LED Running Safety Light Set are designed to be worn across the front of your hands. Knuckle lights allow you full use of your hands without the bothersome bobbling of a headlamp. With Knuckle Lights you can confidently step out in the dark and see and be seen like it's noon.The two units are held comfortably on your hands with soft silicone strapsThe straps are easily adjustable to fit any size hand and even over glovesThe units connect together magnetically so they can easily be stored when not in useThe units are super lightweight at less than 3 oz. eachEach unit is 140 Lumens on high power, so you get a super bright 280 Lumens combinedThe LED pattern is Wide Flood Beam so it puts out light in all directions providing you a steady and even amount of light that does not bounce3 Power Settings: High, Low, BlinkingUSB rechargeable with charging dock, simply place the units on the charging dock after each use and they will always be fully charged and ready to go when you areBattery life per charge: 4 Hours on High Power 8 Hours on Low Power 14 Hours on BlinkingIPX-6 Waterproof technology, these units can be used in any type of weather and will not leak or fail.