I had a Defender mouse, also a laser one, an exact copy of this one in design, just one-on-one with the exception of a number of small features. She lived for 6 years in a stressful mode of work, as a result she began to fail after a "physical injury". It cost around 800-1000r. Since I couldn’t find a new one, I decided to switch to the original represented by Logitech, since the model was re-released. Now let's see how durable she is. First note: side-clicking the wheel is cool, but rarely applicable given the circumstances. But the main buttons are pressed louder and less noble than the Defender.
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