[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 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. shape just fits in the palm of your hand. Once you get used to it, you 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 , no worry about sudden battery exhaustion. It automatically enter sleep mode after long-time no usage. the key to wake the mouse. [Wide System Compatibility]- Compatible with most system including for 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 products. Color: Black Material: ABS Package Contents: 1 x Vertical se 1 x Charging cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.