They were among the finest in terms of price/quality both when purchased and for a few years afterward. However, they, like everything else in the universe, eventually become irrelevant. Although they are frequently used, I think the strap and case have seen better days, so I'm on the hunt for a new pair. Numerous benefits, including good quality and sufficient accuracy for the price (about JPY 7,000). Although I utilized them in a wide range of environments over the course of four years, nothing went wrong—except that they had never traveled to space. After around 3.5 years, the battery needs to be replaced. Under the strap, the hand sweats in the heat, which isn't really a drawback but can be uncomfortable. The illumination is of poor quality. Particularly in models where the screen is upside-down.
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