Acer B7 B277U 68.6 cm (27") 2560 x 1440 pixels QHD LED Monitor Display diagonal___33 cm (13") Earth friendly & meets multiple Earth friendly & meets multiple green certification standards 0 Scrolling directions Vertical Number of scroll wheels 1 Number of movement resolution modes 3 Customizable movement resolution Yes Movement resolution 2400 DPI Buttons type Pressed buttons Buttons quantity 3 Scroll type Wheel Movement detection technology Optical Device interface Bluetooth Purpose Gaming Design Surface coloration Monochromatic Product colour Black Form factor Ambidextrous Power Service life of battery 12 month(s) Battery technology Alkaline Battery type AA Number of batteries supported 1 Power source Batteries Operational conditions Operating relative humidity (H H) 10 90% Operating temperature (T T) 0 40 °C Weight & dimensions Weight 61 g Height 29 mm Depth 58 mm Width 107 mm Packaging data Package type Box Package height 40 mm Package weight 129 g Package depth 18 mm Package width 110 mm Quantity per pack 1 pc(s) Logistics data Harmonized System (HS) code 84716070 vertical 33 the greater the number of these colours the monitor can display and more accurate the reproduction