Product Name: Logitech M575 Ergonomic Wireless MouseSensor Technology: Logitech Advanced Optical TrackingResolution: 100 25,600 dpiNumber of Buttons: 8Connection Technology: USB Receiver, Bluetooth Low Energy TechnologyButtons: 5 Buttons (Left/Right Click, Back/Forward, Scroll Wheel that also functions as a Middle Click)Battery Life: Up to 24 Months with Unifying USB Receiver (Battery life may vary based on usage and computing conditions)Battery Life Using Bluetooth: Up to 20 MonthsSpecial Features: Programmable Buttons, Lightweight, RechargeableMotion Detection Technology: TrackballAbout This ItemErgonomic Comfort Design, Relaxed Hand and Arm: The comfortable, sculpted ergonomic shape naturally fits your hand.Smooth Thumb Control, Precise Tracking: Enjoy excellent cursor control on any surface. Adjust cursor speed using Logitech Options software.Perfect for Tight Workspaces: The trackball doesnt move, making it ideal for tight workspaces and busy desks.Two Ways to Connect and Multi-OS Compatibility: Connect via Bluetooth or USB receiver with a range of up to 33 feet (10 meters) without worrying about dropouts or delays. Nominal value: 400 dpi.Sustainable Design: The plastic parts in the ERGO M575 include post-consumer recycled plastic (Graphite/Black: 50%, Off-White: 21%). The packaging is responsibly sourced with FSC-certified paper.