Poly DA75 USB to QD Black Adapter TAA 507024 00188 CB Design Backlight No Keyboard 507024 00250 CB Design Backlight No Keyboard style Straight Full size keyboard Yes Wrist rest No Adjustable keyboard height Yes Product colour Black Protection features Spill resistant Mean time to failure (MTTF) 150000 h LED indicators Yes Features Wireless range 10 m Power Power source type Battery Keyboard battery type AAA Number of batteries (keyboard) 2 Battery technology Alkaline Battery capacity 1000 mAh Auto power off Yes Service life of battery 36 month(s) Number of batteries supported 3 Battery type AAA Mouse Mouse included Yes Form factor Ambidextrous Movement detection technology Optical Movement resolution 1000 DPI Buttons quantity 3 Buttons type Pressed buttons Scroll Yes Scroll type Wheel Scrolling directions Vertical Mouse battery type AA Mouse battery life 12 month(s) Number of batteries (mouse) 1 Number of scroll wheels 1 System requirements Windows operating systems supported Yes Linux operating systems supported Yes Minimum system requirements What you need:Windows 7 at any time Poly DA Series digital adapters keep call center employees sounding crystal clear from home or in the office they adjust audio to each specific Poly headset