1. Apple computers (Mac OS) do not support the mouse's customized (programmable) function as some functions of Mac OS are not open to public. But the mouse's normal function can still be used in the Apple computers or Mac OS.
2. If you want to customize the buttons, you need to download the software from relevant website (written in the user manual).
3. When you install the software driver in your computer, please choose the language you required. Four languages are available: English, German, Japanese, and Chinese.
Return or exchange within 30 days from the delivered date.
1. Items received within 30 days from the delivered date.
2. Items received unused, undamaged and in original package.
3. Return shipping fee is paid by buyer.