Brand: Logicool (Logitech) Compatible devices: iPad, Mac, Windows Color: Off-white Batteries included: Yes Batteries used: Yes Brand Name: Logicool (Logitech) Manufacturer: Logicool (Logitech) Product Model Number: M575OW Supported OS: Windows 7, Windows 8 Other features: Wireless Connectivity: Bluetooth, USB Product size: 13.4 x 10 x 0.1 cm; 145 g Item weight: 145 grams Connectivity supports Logicool's proprietary Unifying USB and Bluetooth / Connection range up to 10m (USB port): Windows 7 or later, macOS 10.13 or later (Bluetooth): Windows 8 or later, macOS 10.13 or later, iPad OS 13.4 or later Batteries used: 1 AA battery Operating distance: Approximately 10m Used a few times. I am selling it because I don't use it much anymore.