NATURAL ELEVATED HANDSHAKE POSITION - Mouse with ergonomic principles to prevent forearm tension, improves hand posture and reduces pain caused by median nerve pressure; Textured rubber coating for a comfortable grip with effective blue LED trim PROGRAMMABLE BUTTONS - 5 Buttons and 1 middle click that can be programmed using Perixx driver (available on our website) COMFORTABLE GRIP - High-quality rubber coating with effective blue LED trim assures a comfortable hand grip and premium experience ADVANCED OPTICAL TRACKING TECHNOLOGY - Adjustable tracking resolution with two switchable DPI levels (1000/1600) allows smoother and more precise movement than a standard mouse on different kinds of surfaces CERTIFIED QUALITY - FCC, CE, RoHS qualified ergonomic mouse. Compatible with Windows 7, 8, and 10. Package includes 1 wireless mouse, 1 USB receiver, 1 user manual