Equipped with LineTec optics that carry light from two bright LED’s through light guides right up to the edge of the housing. A high degree of all-round visibility. The dual lines of light visible from the rear offer other traffic participants more perspective, allowing them to judge your position better. That makes you safer. Dynamo rear lights with the BrakeTec function must be connected to Dynamo powered front lights. The BrakeTec Rear lights analyse a signal given off from the headlight, and if your speed drops significantly, a chip in the rear light will detect this and cause the rear light to light brighter in pulses.