VeloChampion Bike Lights USB Rechargeable Front and Rear Set Rechargeable Light Set with 100 Lumens of Power output from the front, 75 Lumens from the rear. Recharge via a USB port on your laptop or PC means there is no need to keep buying expensive batteries! This bright, lightweight and versatile light set is perfect for the urban commuter and suits the needs of those wanting to cut the cost and inconvenience of replacing bike light batteries. Simply clip your lights off your bike/helmet in the morning and recharge on your work PC or clip them off at night and recharge at home. Any standard PC or laptop will have a suitable USB Port. One recharge will last most commuters all week ! Tool-free quick release mounting system allows quick and hassle free removal in a hurry The slim rear light is perfect for any bike seatpost - including aero and TT bikes! Battery level indicators (fully charged and warning when the battery is getting low). Super Bright, Constant and Flashing modes on both lights.