A4Tech 2.4G Pinpoint Optic Engine USB Mouse and Wireless Keyboard (9500H) Mouse specs 16 pre defined functions to choose from including screen capture TutorPen and 4 way wheel cover a variety of multimedia and internet purposes Channel lock setting prevents unwanted interference Resolution adjustable 800-2000 DPI Net weight 74g Keyboard specs, Maximum customizability 104 keys 12 hot keys