Mice & Trackballs Note: 2.4G Wirele Mouse and USB Wired Mouse are Available.2.4G Wirele Mouse:Mouse requires 1 AAA batteries Ergonomic Design - Handheld trackball mouse wirele can greatly avoide the harm of palm and muscle of your wrist for long time using mouse. Trackball Comfort - Ergonomic handheld trackball mouse wirele is a best choose to reduce the chances for Arthritis and CTS suffers. Hold ergonomic handheld trackball mouse wirele in your hand like a trigger and use your thumb to move around. Sculpted shape supports your hand staying in one place, move the cursor without moving your arm.Suitable for both left and right hand - New style, no space limitation, left/right clickers, fit left and right handed users. 2.4G Wirele Connection - Handheld trackball mouse wirele have a Sensitive rolling ball and frequency stable 2.4GHz receiver(For wirele mouse, the valid range distance is about 10M, the signal can't go through wall). Powered by One AAA battery (not included) Wide Application - Handheld trackball mouse wirele including USB 2.0 interface, plug and play, no software required. Suitable for laptops and desktops, but NOT FOR TABLETS AND CELLPHONES. Compatible with: Windows XP / VISTA / Win7/ Win10/ Linux / Unix / Mac OS.USB Wired Mouse Ergonomic Design - Ergonomic Handheld Trackball Mouse Wired can greatly ease the harm of palm joint or muscle on your wrist and muscle for long time using mouse. Handheld Trackball Mouse Wired is a best choose to avoide Arthritis and CTS suffers. Attention - Compared with similar mice, Ergonomic Handheld Trackball Mouse Wired "LEFT CLICK" key is under the hole. The left button at the top of trackball mouse is used to Lock Browser and go throught the web page easily. When you go throught the web page, you only need to click the left button to lock the current page, then you can browse the web page by rolling up and down. Trackball Comfort - Hold Ergonomic Handheld Trackball Mouse Wired in your hand like a trigger and use your thumb to move around. Sculpted shape supports your hand staying in one place, move the cursor without moving your arm.Suitable for both left and right hand - New style, no space limitation, left/right clickers, fit left and right handed users. Wired With Usb Cable - Plug and play, free driver, innovative input devices, no software required, so easy. Ergonomic Handheld Trackball Mouse Wired is compatible with any system like Mac OS, Linux, Unix, Windows 10, Windows 8, Windows 7, Windows XP, Windows 95, etc.2.4G Wirele Mouse USB Wired Mouse