The DX 25 is a good taillight se. It requires 2 batteries (AAA). The batteries that I use to keep very long. Despite only one LED is bright with good lateral visibility. And it has integrated reflector surfaces which there is otherwise not unfortunately in battery lamps for seatpost mounting. As a correction to the product, I note that there is no flashing mode. Either on or off the lamp.
The downside of my alienation star, is the retainer. It is contrary to the product description is not made of plastic but rubber. Rubber has unfortunately to age the property quickly, and the tape is cracked. Here a more durable solution would have been better.
