Wireless Ergonomic Design: ProtoArc ergonomic mouse features an extended wrist rest that fits snugly in the palm of your hand for a more natural, relaxed position of the forearm and wrist, reducing overall fatigue, compared to standard mice. | Connect up to 3 Devices: This ergonomic wireless mouse features dual BT 4.0 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. | 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.