Details Feature - 1. Mobile operation is easier than ordinary mouse.2. Ergonomic design is more suitable for gripping.3. Plug and play; no need to drive.4. Delicate and compact; preferred by notebook users.5. With on / off switch.6. Universal 2.4GHz wireless USB optical pen mouse adjustable 1600DPI 4 button mouse for PC smart TV set-top box Specification - Color - red; gray; blueNumber of keys - 4 keysDPI - 800/1200 / 1600dpiKey life - 5; 000; 000 timesCurrent - 1.5V 15mARF frequency - 2402MHZ-24080MHZPower supply - 1 AAA battery (not included)Material - ABSApplications - PC; smart TV; set-top boxSupport Windows 2000 / XP / Vista / 7; Android; Mac OS; etc.Size - 14 * 2 * 1.5cm / 5.5 * 0.78 * 0.59 ''Packing weight - 56.4g Note - Due to manual measurement; please allow slightly different sizes.Due to different displays and different lighting; the picture may not show the actual color of the item. Thank you for your understanding.1 x Pen Mouse1 x NANO Receiver1 x User Manual