This is a wireless keyboard and mouse that came with a desktop computer I purchased in October 2025. I am selling them because I am using different ones. I opened the box once to take photos. Batteries are included. (Connection Notes) It will not be recognized by adding a standard Windows Bluetooth device. You must connect the receiver to a USB port. You can use it by connecting the dedicated receiver, stored inside the mouse, to a USB port on your PC. You can use it if "HP 510 Wireless KBMS Combo" is displayed in the Windows Bluetooth settings. Product Name: HP 510 Wireless Keyboard HP 510 Wireless Mouse Combo Model Number: Keyboard TPA-P005K / Mouse TPA-P005M Thank you. Connection Type...Wireless (Bluetooth) Keyboard Layout...Japanese