· Connect up to 3 Devices: This ergonomic wireless mouse features dual BT 5.0 and 2.4G USB connectivity modes for simultaneous connection of up to 3 different devices, and is compatible with Windows 8, Windows 10 or higher, Mac OS X 10.12 or higher, and Android 4.3 or higher· Rechargeable Ergonomic Mouse: The Bluetooth Vertical Mouse has a built-in 500mAh Li-Ion battery that can be conveniently recharged using the included Type-C cable· Ergonomic Vertical Design: The ergonomic mouse wireless keeps your wrist naturally straight, putting your forearm and wrist in a more natural and relaxed position, which can reduce overall fatigue compared to a standard mouse. Warm tips: We encourage you to relax your palm and hold the mouse naturally when using a vertical mouse· Warm tips: Since it takes a learning curve to get used to the shape when using our ergonomic mouse for the first time, it may cause inconvenience to your mouse grip, We recommend that you take 1-2 weeks to get used to it, as many users find that it will help reduce the pressure and pain on your wrist caused by long-term use of the mouse and improve comfort· Notes: We recommend that small to medium hands use our ergonomic vertical mouse. Please measure the size before ordering for a better fit and more comfort· Adjustable Dpi & High Performance: 1000/1600/2400 DPI levels provide higher sensitivity than standard optical mice for precise optical tracking; with the back and forward buttons, you can easily navigate websites and increase work efficiency. Note: All buttons are not programmable and the forward and back buttons are not compatible with Mac OS systems· Silent Clicking Sound: Our vertical mouse's whisper-quiet clicking helps you focus on what's important without any noise distractions. Therefore, it is perfect for shared workspaces such as offices or libraries