Kryptonite Avenue R-50 COB rear light Make sure you are clearly visible with this rear light from Kryptonite. The lamp has multiple modes and is rechargeable with the included USB cable. The lamp has an energy saving mode, which ensures that when the battery percentage falls below ten percent, the lowest lumen output is automatically selected. Specifications: Housing color: black Lamp color: red Gender: unisex Material: plastic Max. number of lumens: 50 Power supply: rechargeable built-in battery Battery life: up to 11 hours Contents: 1 Bicycle lamp 1 USB cable