I am writing because I want to protect potential buyers, as unfortunately I bought it 3 months ago, being influenced by the 2 positive reviews that are listed here from 2021!! and since then, nothing! Well, the only positive thing is that when it remembers to work, it is reliable in its measurements. It measured the exact same distance by car. The reason I do not recommend it is the cheap construction quality, resulting in its operation in real conditions on the roads of the Athens basin to have interface issues with the screen and the magnet.
The magnet does not tighten, no matter what you do, causing it to move and change angle with slight vibrations and not have contact with the sensor, which when you place the battery inside, it literally floats as it does not have a clip to lock onto the sensor, and it only touches the contact when you close the lid, so in the first vibrations due to road irregularities, the contact is immediately lost and your screen only shows the time... Unless you have a screwdriver with you all the time to put the battery back into the sensor every 3 minutes in a way that it touches the contact and make the sign of the cross before starting again, so that it does not move by itself! The only thing that works flawlessly is the time, which never gets lost! You will always know what time it is, but not the distance you have traveled, and accordingly, you will not have indications for any function that is affected by measurements. Even the screen that you place on the handlebar base fits very loosely and you have the feeling that in the first bump on the road, it will fly in the air. Of course, there is no mention of warranty coverage, it is better to save the 30 euros it costs for something better than this construction, which is unbelievable to be found in high popularity positions

Very good counter and in combination with its price it soars. In its measurements it is very accurate and has all the measurements that the rider should have at his disposal to feel confident. It accurately measures speed, distance, temperature, and keeps a record. It has a backlit screen, is elegant, and easy to install even for a beginner, just read the instructions carefully.

One possible drawback might be the attachment of the magnet to the spoke, it didn't attach well for me but with a little effort, I got it to work. I recommend it.