[Multi-Device Mouse]- This ergonomic mouse supports 3 devices connection with dual modes: Bluetooth 5.0 ,2.4G wireless with USB receiver and USB wired. Easy to change modes with the back switch. It also has a receiver storage slot to prevent loss. [5-Button Programmable]- This led wireless mouse comes with a built-in customization program for easy use. With an LED screen, you can quickly customize 16 kinds of functions of 5 buttons: left/right click, double click, Volume +/-, calculator, copy, paste, desktop, web browser, screen lock, etc. You can also check the battery level ,connection and DPI Level status on the display [Master Precision] EM11PRO features 5 adjustable DPI settings (1000/1600/2400/3200/4000), allowing you to finely tune the mouse sensitivity according to your needs. Whether you require swift responsiveness in various usage scenarios or pixel-level precision in detailed design work, this mouse is up to the task, providing you with exceptional versatility. [Ergonomic Vertical Design]- Help to places your hand in a natural "handshake" wrist & arm position for smoother movement and less muscle tension. Ergo shape just fits in the palm of your hand. Once you get used to it, you will love it. [Rechargeable Bluetooth Mouse]- With built-in rechargeable battery, you no longer need to buy batteries any more. It can be also used while being charged, no worry about sudden battery exhaustion. It will automatically enter sleep mode after long-time no usage. Press the key to wake the mouse. [Wide System Compatibility]- Compatible with most system including for Windows 11 / 10 / 8.1 / 8, for macOS 10.14~10.15, for iPadOS 13 and versions later on. Fit for Notebook, PC, Laptop, Computer and other device. Not fully compatible with for Apple products. Color: Black Material: ABS Package Contents: 1 x Vertical Mou