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Professional-grade Ergonomic Optical Waterproof Mouse with 3-button Scroll (PS2 ONLY) (Black) | OMWK0C01PS2-BK by WetKeys Washable and Waterproof Keyboards
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What is a good optical mouse, with 3 real mouse buttons? I.e. I don't want the scroll wheel to be the middle button, I want a real button there. - Quora
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