LOGI ERGO M575S Wireless Trackball 80000596 910-007029 Product Description: Logitech Ergo Series ERGO M575S - trackball - Bluetooth, 2.4 GHz - graphite Device Type: Trackball - ergonomic Connectivity Technology: Wireless - Bluetooth, 2.4 GHz Colour: Graphite Dimensions (WxDxH): 10 cm x 13.4 cm x 4.8 cm Weight: 145 g Wireless Receiver: Logitech Logi Bolt USB receiver Movement Detection Technology: Optical Buttons Qty: 5 Movement Resolution: 2000 dpi Performance: Realtime sensitivity switching 400 - 2000 dpi Features: Quiet Clicks technology, Thumb Control, 3 programmable buttons, Bluetooth Low Energy Compatible, Logitech Advanced Optical Tracking, scrolling wheel Battery: AA type Product Recycled Content: 52 % - made of recycled post-consumer plastic