Optical tracking technology, works on various surfaces, ideal for home, office, or gaming use. Contact Optical Mouse, comfortable design. Ultra-thin design for high portability. Bluetooth wireless technology, no USB receiver required. (Note: please check if your computer has Bluetooth functionality.) Compatible with: Windows 2000, Windows XP, Windows 7, Windows Vista, Windows 98, Windows ME, Windows 8, and macOS. Pointing Device Host Interface: Bluetooth Power Supply: 1 x AAA battery (Not Included) Net Weight: 56g Item: Contact Mouse Type: Wireless Mouse Color: White Material: ABS Size: 55mm Package Contents: 1 x Wireless Mouse Note: Light and display differences may cause slight color variation between the image and the actual item. Measurement may vary by +/- 1-3cm.