KENSINGTON SlimBlade Pro Trackball 80004518 K72080WW Product Description: Kensington SlimBlade - mouse - RF Device Type: Mouse Connectivity Technology: Wireless - RF Dimensions (WxDxH): 13.3 cm x 15.3 cm x 5.6 cm Weight: 285 g Localisation: Europe Wireless Receiver: USB wireless receiver Movement Detection Technology: Laser Features: Scrolling ball, battery indicator Battery: AA type Manufacturer Warranty: 3-year warranty