This is a cost-effective wireless mouse. It uses a 2.4GHz wireless connection and an optical USB, allowing for comfortable mouse operation. It's also a gaming mouse with a total of 6 buttons! You can use it immediately without installing any device driver software. Size: Approximately 110 x 67 x 40mm Number of buttons: 6 Maximum operating distance: Approximately 10m (※Varies depending on the usage environment) Power supply: 2 AAA batteries (sold separately) Supported OS: Windows XP, Vista, Windows 7, Windows 8 and later PCs Weight: Approximately 70g (without batteries) Colors: Black (out of stock) / Red / Gold ---------------------------------------- Shipping company: Japan Post Fixed-Rate Mail