Sennheiser MZH 20 1 Product family___QMC Dynamic hi fi stereo headphones DMC HDO Dynamic hi fi stereo headphones CB Design Backlight No Keyboard style Straight Full size keyboard Yes Wrist rest No Adjustable keyboard height Yes Product colour Grey Surface coloration Monochromatic Protection features Spill resistant Mean time to failure (MTTF) 150000 h Features Wireless range 10 m Plug and Play Yes 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 Mac compatibility Yes Mac operating systems supported Mac OS X 10 Windscreen cover for basket windscreen MZW 20 1