This is the white model of Kensington's wireless vertical trackball, the "Pro Fit Ergo TB450." ■ Condition Appearance: No major scratches, stains, or yellowing. Please check the photos for details. Accessories: Body only (can connect via Bluetooth without a receiver). ■ Features Ergonomic Design: The easy-to-grip angle reduces strain on the wrist. Easy Maintenance: Features a ball release button, making maintenance very easy. Connectivity: Supports Bluetooth and wireless connections. ■ Other Operation confirmed. Will be packaged after cleaning with alcohol disinfectant. No smokers or pets. Immediate purchase is welcome. Thank you for your consideration. #Kensington #Kensington #Trackball #Mouse #Ergonomics #PCPeripherals #TB450