You are on the download page of the driver A4-Tech Optical Mouse (K4-61X-Red (5)) (RTL) USB 5btn-Roll. Before downloading, you must choose the version and bitness (32 or 64-bit) for your operating system. There is support for the following versions of Microsoft Windows operating systems. Select the required version of the Windows operating system to download the driver A4-Tech Optical Mouse (K4-61X-Red (5)) (RTL) USB 5btn-Roll:
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