Kryptonite F-300 and R-30 bicycle lights Make sure you are clearly visible with these bicycle lights from Kryptonite. With the built-in battery indicator you can see how much battery charge the lamp has. As soon as the charge is 25% the indicator light turns red, as soon as the percentage is 50% yellow and at 100% the light turns green. The built-in battery can be charged via a USB cable. Specifications front light F-300: Colour: black Lamp colour: white Material: plastic Dimensions: 22.8 x 14.3 x 6.5 cm (L x W x H) Power supply: battery (integrated) Weight: 0.31 kilograms Specifications rear light R-30: Colour: black Lamp colour: red Power supply: battery (integrated) Dimensions: 8.4 x 22.8 x 4.5 cm (L x W x H) Battery life: up to 7 hours and 30 minutes Weight: 0.15 kilograms Contents: 1 Bicycle front light F-300 1 Bicycle rear light R-30