DELL 3KP7H 2.5" 2400 GB SAS Interface___SAS Rubber Product colour White Protection Rubber Product colour White Protection features Spill resistant Backlight No Surface coloration Monochromatic Scrolling directions Vertical Numeric keypad Yes Number of products included 2 pc(s) LED indicators Yes Form factor Ambidextrous Harmonized System (HS) code 84716060 Ergonomics Wireless range 10 m LED indicators Yes Features Wireless range 10 m Receiver Wireless receiver interface USB Type A Receiver type Nano receiver Power Service life of battery 18 month(s) Power source type Battery Battery technology Alkaline Number of batteries supported 4 Battery type AA Mouse battery type AA Number of batteries (mouse) 1 Keyboard battery type AAA Number of batteries (keyboard) 2 Battery capacity 2000 mAh Mouse Form factor Ambidextrous On off switch Yes Buttons type Pressed buttons Movement resolution 1000 DPI Movement detection technology Optical Buttons quantity 3 Scroll Yes Scroll type Wheel Mouse battery type AA Number of batteries (mouse) 1 Scrolling directions Vertical Mouse included Yes Acceleration (max) 30 G Mouse tracking speed 160 ips Feet durability 250 km System requirements Windows operating systems supported Windows 10 4 cm AMD FreeSync refresh rate range 30 144 Hz Management features On Screen Display (OSD) Yes Number of OSD languages 16 On Screen Display (OSD) languages Simplified Chinese Interface : SAS Hot swap : Yes