Wireless mouse with IR sensor, ergonomic design - Brand: ELECOM - Color: Black - Connectivity: Wireless - Features: IR sensor - USB receiver: Included - Shape: Ergonomic Power source...Includes AA batteries Simply connect the included receiver to a USB port and turn on the switch on the bottom to use. Operation confirmed on Windows 11. The wheel response is a little weak, but it works. Left and right clicks work without issue. Size: Approximately 55 x 100 x 40mm