KENSINGTON Trackball Pro Fit Ergo TB450 80004518 K72194WW Product Description: Kensington Pro Fit Ergo TB450 - trackball - Bluetooth, 2.4 GHz Device Type: Trackball - ergonomic Connectivity Technology: Wireless - Bluetooth, 2.4 GHz Dimensions (WxDxH): 9.344 cm x 5.01 cm x 13.816 cm Weight: 129.4 g Wireless Receiver: Nano USB wireless receiver Movement Detection Technology: Optical Buttons Qty: 7 Performance: Realtime sensitivity switching 400/800/1200/1600 dpi Features: 5 programmable buttons, DPI switch, forward button, backward button Battery: AA type OS Required: Windows 10 or later, Apple macOS 10.14 or later, Google Chrome OS 91 or later, Apple iPadOS 16 Product Recycled Content: 50 % - made of recycled plastic Manufacturer Warranty: 3-year warranty