With wireless transmission, the longest transmission space is 10 meters.The wireless mouse has a mini compact size, which is easy to carry.With ergonomic design, it is comfortable to use.It is compatible for Windows 98 SE/SME/2000/XP/2003 and for Mac-OS.Item Name: Wireless MouseMaterial: ABSDPI: 1000Battery: 1 x AA Battery (Not Included)Transmission Space: 0-10mWireless Transmission Frequency: 2.4GHzCompatible Systems: for Windows 98 SE/SME/2000/XP/2003, for Mac-OSInterface: USBFeatures: Wireless, Portable, Computer AccessorySize: 10cm x 6cm x 3.3cm/3.94" x 2.36" x 1.3" (Approx.)Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Wireless Mouse1 x USB Receiver