Microsoft Wireless Mouse Model: Wireless Mobile Mouse 4000 Used in good condition and working perfectly. Price: 80 Key Features: - Side back button - Upgraded scroll wheel with left and right tilt - Runs on an AA battery for approximately 10 months - External receiver slot for easy use so you don't lose it For details: - BlueTrack Technology: Provides high tracking accuracy superior to laser, and works efficiently on most surfaces like carpets, wood, and granite (except clear glass or mirrors). - Reliable Wireless Connection: Operates at 2.4 GHz via a small Nano Transceiver with a range of up to approximately 4.5 meters. - Compact and Comfortable Design: Ideal size for portability and travel, designed to fit both hands. - Receiver Storage: The bottom of the mouse has a dedicated slot to insert the USB receiver inside to protect it from loss during transit. - Long Battery Life: Runs on a single AA battery and lasts up to 10 months, with a smart LED indicator that alerts you when the power is low. - Customizable Buttons: Features 4 buttons, including a side button and scroll wheel, whose functions can be customized via compatible Microsoft software. - Four-Way Scroll Wheel: Supports Tilt Wheel technology for scrolling vertically and horizontally to easily navigate long documents and websites.