I have my own pair of these and love them because they’re so easy to use and clip on, shine very bright and are therefore a huge safety asset. I'm selling these for my partner who never rides his bike and hasn't really ever, so they've hardly been used. There’s a USB key on the light itself, so you can just charge on your computer and the tiny indicator light comes on to show you it’s all charged up. The lights are attached to a reliable rubber contraption that goes around the bars of your bike, the front light is white and back is red. They are super lightweight and waterproof. I purchased the twin pack for 45.00 and am selling them for 30.00. Pick up at my house near dodger stadium in Solano canyon across from solano elementary school 90012 OR I can deliver if it’s within 5 miles for a fee of 10.00. Or shipping. Below are more details, let me know if you have any q’s. LEDS- Surface Mount (SMT) LED designed to provide maximum brightness level for up to 90% of the battery burn time for each mode. 100% WATERPROOF- The Blinder MOB is IP67 Tested and 100% waterproof against all elements INTEGRATED USB PLUG- Designed to be exposed to the elements, and then some. LIGHT MODES- Steady high, steady low, strobe, fancy flash, eco flash. BIKE ATTACHMENT- Tool-less removable silicone straps for bars/posts 22 - 35mm+ diameter. Fits Aero & Oversize bars Front LED generates 20 lumens for 500+ meters; Rear LED generates 11 lumens for 500+ meters of visibility Target Run Time (hrs): 2 constant, 11 eco flash (Per Light) USB Charge Time: 2.5 hours (Per Light) USB designed to be exposed to the elements Fully waterproof and wicked bright - 20 lumens front, 11 lumens rear