
As it is advertised as a brake light control it only offers a flashing pattern to get the attention of drivers behind us. In order not to interfere with the expected brake lights, I've used this on my third (middle) brake light and it's working well so far. When activated, it flashes 3 times very quickly, then 3 times a little slower, and then it's on steadily. However, please note that this is only recommended for LED bulbs.

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