I installed it on a bicycle that I normally ride for folding about two years ago. After that, I changed the batteries, so I did not have trouble, so I bought it again. As a matter of desire, I think that the degree of freedom increases for the installation position as long as the cable is a little longer.
There are other writes saying that it is dark when the lamp is lit but it is enough for use. It has both functions of brake lamp and position lamp, it is inexpensive, battery is also AA and economical.
It broke down within one month after use. I would like you to manufacture it a bit more properly. However, since it can be used as safety lights afterwards, it is good because it stands out considerably too. I think that the function as a brake light (brake light) is meaningless unless it is a bit brighter. With exactly the same illuminance as the lighting state of the safety light, you will not notice that it is a brake light.
I was looking for such a product. The front lights are rich in lineups even at stores, but good ones have been found because there are few warning signs to the back. I am very satisfied as a function. When connecting a switch attached to a caliper etc., it responds to the caliper side switch at all times, and all lights up. When you do not want to use it, remove the sensor terminals. The main body side terminal (female type) is covered with the slide. Although there is rainproof notation, I do not know whether it is valid at terminal connection. I think that the car body attachment tool is supposed to be attached to the seat post, but you can set the angle freely up and down, but the horizontal direction will be fixed. I thought that it would be better to increase the degree of freedom of the installation tool so that it could be installed in other places. With the design based on the ellipse, I feel a little uneasy. I think that it becomes more suitable for the load system if it is a sharp outline. The brightness at the time of lighting with 3 LED is constant, the blinking pattern at all times and all three lights at the time of the brake operation are continuous lighting, the difference can be seen, but when the brightness at all lighting increases by one step, the contrast becomes more braked I think that operation can appeal. I look forward to the future development of the product.