Thank you for viewing! ◡̈* Elecom Wireless Mouse M-BL21DBSKRD Silent Antibacterial 5 Buttons 3-Step Pointer Speed Adjustable Red I have been using it for about half a year. There are no noticeable scratches, but the bottom is slightly dirty. Please refrain from purchasing if you are concerned. *There is no outer box or instruction manual. Only the main unit and receiver are included. ⚫︎Instant purchase is OK. ⚫︎Please understand that this item is stored at home. (No pets or smoking habits) Thank you very much m(_ _)m The following is a quote ---------------------------- 【 Specifications 】 ■ Interface: USB ■ Connector shape: USB (A) male ■ Compatible models: Windows OS and macOS equipped with a USB port ■ Supported OS: Windows 10, Windows RT8.1, Windows 8.1, Windows 7, OS X El Capitan (10.11) ~ macOS Catalina (10.15) *It may be necessary to update to the latest version of each OS or install a service pack. ■ Resolution: 1000/1500/2000 (switchable) ■ Communication method: GFSK method ■ Radio frequency: 2.4GHz band ■ Radio wave reach distance: When used on a magnetic material (such as an iron desk): 3m, when used on a non-magnetic material (such as a wooden desk): 10m ■ Reading method: Optical sensor method ■ LED color: Blue ■ Number of buttons: 5 *Including the wheel button ■ Number of wheels: 1 ■ Receiver storage: ○ ■ Continuous operating time: Approximately 235 hours ■ Continuous standby time: Approximately 416 days ■ Estimated battery life: Approximately 406 days *When 5% of 8 hours of computer operation per day is allocated to mouse operation ■ Power supply (main unit): 1 AA alkaline battery, 1 AA manganese battery, or 1 AA nickel-hydrogen battery ■ Rated voltage (main unit): 1.5V ■ Color: Red ■ External dimensions (mouse body): Width 56.0mm x Depth 98.0mm x Height 34.3mm ■ External dimensions (receiver): Width 18.0mm x Depth 13.1mm x Height 5.7mm ■ Mass (receiver): Approximately 2g