I used this in the office for four months, but I'm selling it because I've switched to something else. It's still in good working condition, so please consider it. I've also disinfected it as much as I could. Brand: Logicool (Logitech) Color: Black (1-year warranty) Connectivity Technology: Bluetooth, USB Features: Wireless Movement Detection Technology: Trackball Number of Buttons: 5 Cursor control is done by rolling the ball on the main unit while keeping the mouse in a fixed position. A classic Logitech trackball mouse. The newly angled scroll wheel allows for a more natural and comfortable finger position/fits a wide range of hand sizes. Smoother and more precise ball control/2000 DPI tracking accuracy. Connects via Logitech's proprietary Unifying USB or Bluetooth/Up to 10m connection range. (Bluetooth) Windows 10, 11 and later, macOS 10.15 and later, iPadOS 14 and later, ChromeOS / (USB receiver) Windows 10, 11 and later, macOS 10.15 and later, ChromeOS Weight: 145g The battery life is stated as 24 months, but since I've used it for 4 months, you can expect it to last about 20 months. The photos show everything included. Please refrain from purchasing if you are concerned about it being a used item. I will ship it via Takkyubin Compact.