Logitech ADVANCED Combo Wireless Keyboard and Mouse Band colour___Blue. Green Incomparable Color Incomparable Color horizontal 178° Maximum refresh rate 75 Hz Contrast ratio (dynamic) 3000000:1 Contrast ratio (typical) 3000:1 Screen shape Flat Anti glare screen Yes Display brightness (typical) 250 cd m² Backlight type W LED Panel type VA HD type Full HD Touchscreen No Native aspect ratio 16:9 Display resolution 1920 x 1080 pixels Display diagonal 60 4 GHz Design Product colour Black Keyboard style Straight Wrist rest No Technical details Product colour Black Numeric keypad Yes Number of products included 1 pc(s) Form factor Right hand Harmonized System (HS) code 84716060 Power Power source type Battery Battery technology Alkaline Number of batteries supported 9 Battery type AA Mouse battery type AA Number of batteries (mouse) 1 Keyboard battery type AA Number of batteries (keyboard) 2 Battery capacity 2000 mAh Mouse Form factor Right hand Scroll Yes Scroll type Wheel Mouse battery type AA Number of batteries (mouse) 1 Mouse included Yes System requirements Windows operating systems supported Windows 7 29 kg Harmonized System (HS) code 84716060 Other features Pointing device No