When using it, I had the timer on a bench that would be about 2-3 feet away from the firearm (Sig Sauer P226 9MM in this case).
Issue #1: The video shows the results after taking four shots, each about 1 second apart. The first number displayed kept incrementing which I believe was an overall timer for the day and I could not figure out how to reset. The split time between shots was usually not even close. For my third shot, it showed a split of 13.76?!? Only 4 seconds elapsed so not even possible. As a comparison, I was also using my MantisX and included a screenshot of accurate split times for the 4 shots.
Issue #2: It seemed to have an overall timer value that continued to increment and would display as my first shot and split time. I could not figure out how to reset this.
Issue #3: When I had the timer in 'instant' mode, as soon as I pressed GO, the buzzer would cause the timer to record shots. Sometimes it was just one shot but it would also record up to 4 shots as well. I have a video of this but the reviews only allow posting of one.
Since many others have posted favorable reviews, I believe I was just the unlucky recipient of a defective one. This should have been better quality controlled and never made it to the hands of a consumer for such an expensive product. I'm going to send it back and try a different brand.