Features: - - Vertical ergonomic design that fits the natural contour of the wrist and palm - Special finger slot design - 3 adjustable DPI levels: 400, 800, and 1600 - Optical laser technology for precise control - Left and right mouse buttons, two thumb buttons, and a clickable scroll wheel - Rechargeable built-in battery - Built-in weight for improved stability and balanced center of gravity - Comfortable hand-holding posture supports natural wrist alignment - Designed for office use and gaming - Side-mounted right, left, and scroll buttons for relaxed hand positioning - Reduces hand fatigue Specifications: - Color: Black, Black Blue, Black Purple, Black Silver Grey - Size: 102 x 72 x 82 mm - Connection method: Wireless - DPI: 1600 (adjustable) - Connection port: USB 2.0 - Buttons: Left button, Right button, Scroll wheel, Forward/Back buttons, Middle (On/Off) button - Wireless range: Up to 10 meters - Input rating: 5V, 10mA - Charging time: Approximately 2 hours - Compatible with: Windows 98/2000/XP/Vista/7/8, macOS - Net weight: 116g Package includes: - 1 x Wireless Ergonomic Vertical USB Mouse (battery included) - 1 x USB charging cable