I am selling this item because I opened it but ultimately did not use it. I will send the main unit, case, and receiver. ELECOM Wireless Mouse 2.4GHz Slint M-TM10DBBK/EC Thin, Silent 4-Button Presentation Mode Function Compatible with Windows Mac Black 【Specifications】 ■ Interface: USB ■ Connector Shape: USB (A) male ■ Resolution: 800/1600 counts (switchable) ■ Communication Method: GFSK method ■ Radio Frequency: 2.4GHz band ■ Radio Wave Reach: 3m when used on magnetic materials (such as iron desks), 10m when used on non-magnetic materials (such as wooden desks) *This is a test value in our environment and is not a guaranteed value. ■ Reading Method: Optical sensor method ■ Number of Wheels: 1 ■ Receiver Storage: Yes ■ Continuous Operation Time: Approximately 330 hours ■ Continuous Standby Time: Approximately 833 days ■ Estimated Battery Life: Approximately 628 days *When 5% of 8 hours of computer operation per day is allocated to mouse operation ■ Power Supply (Main Unit): 1 AA alkaline battery, AA manganese battery, or AA nickel-metal hydride battery ■ Color: Black ■ External Dimensions (Mouse Body): Width 55.5mm × Depth 103.8mm × Height 28.0mm ■ Size Classification: M size ■ Weight (Mouse Body): Approximately 66g *Including batteries ■ External Dimensions (Receiver): Approximately Width 15.0 × Depth 18.0 × Height 6.0mm ■ Weight (Receiver): Approximately 2g 【Description】 ■ This is a thin mouse with a thickness of 28mm, making it easy to carry in a bag. ■ Equipped with BlueLED, which reflects light more accurately even on small bumps and dust, allowing for comfortable use anywhere. ■ Adopts a silent switch that does not make a clicking sound when the mouse is clicked, so it can be used in places where noise is a concern. ■ The receiver can be stored inside the mouse body, making it convenient to carry and reducing the risk of losing the receiver. ■ There is a power switch on the back of the main unit to prevent battery consumption when not in use. ■ Equipped with a battery level indicator lamp to notify you when it's time to replace the batteries. ■ M size with a thin design, perfect for mobile use. ■ Symmetrical design that is easy to use for both right-handed and left-handed users. Power Source: Battery-powered