This versatile 6-button mouse is in very good used condition, and includes a Logitech Nano USB Unifying receiver and a battery. It can connect to multiple devices using both a Logitech Unifying USB receiver (2.4 GHz wireless connection), or Bluetooth. The mouse is supported in a wide variety of operating systems: the Unifying receiver is supported by Windows 10 or 11, Mac OS 10.5 or later, ChromeOS and Linux kernel 2.6+. Bluetooth connection is supported by Windows 10 or 11, Mac OS 10.5 or later, ChromeOS, Linux kernel 2.6+, Android 5.0 or later and iPadOS 13.4 or later.The mouse was tested with a Windows 11 desktop, a Windows 11 laptop, and an Android phone. I tested connecting to multiple devices by connecting via Unifying receiver to a PC (Channel 1) and by Bluetooth to an Android phone (Channel 2). The button beneath the scroll wheel then toggled between devices.No added software was required to use the mouse in Windows 11 or Android. However, installing Logitech Options+ software for PC or Mac will allow for customization of mouse buttons. It will also give you extra "mouse gesture" functions. Logitech Options+ and information for this mouse are available at the Logitech support page for it. This may be found by Googling "logitech m585 support"; the Logitech product page will appear at the top of the search results.To use with Bluetooth on a Windows 11 device, go to Settings/Bluetooth & Devices/Add Device/Bluetooth. Press and HOLD the round black "easy switch" button beneath the scroll wheel, until the LED light flashes rapidly; "M585/M590" should show in device list; click it to complete the connection.If you have the mouse connected to one device via the nano receiver, but want to connect it to a second device via Bluetooth, press the "easy switch" button briefly, to light the "2" LED, then long-press the "easy switch" button until the LED flashes rapidly; complete connection as above.Functions: Left click, right click, scroll, scroll wheel (middle button) click, scroll wheel left tilt and right tilt, back and forward thumb buttons on top left side, channel selection button ("easy switch") below the scroll wheel.Runs on 1 AA battery (included)."Delivery" date is 's estimate and depends on carrier. Measurements are approximate to the best of our ability. Colours vary on different monitors/devices. Our premises are smoke-free. If you want to purchase more than one item, please go ahead and purchase and pay. I combine shipping and will promptly refund your shipping overage. Please use the shopping cart for combo shipping.