3M High Clarity Privacy Filter for 24.0" Widescreen Monitor (16:10) (HC240W1B) Brands_Broadcom Ports & interfaces Wireless range Ports & interfaces Wireless range 27 m Power Battery type AAA Battery technology Alkaline Number of batteries supported 2 Receiver Wireless receiver interface USB Features Laser class 2 Colour of product Black Laser wave power 1 mW Weight & dimensions Width 31 mm Weight & dimensions Package weight 120 g Package height 45 mm Height 66 mm Package depth 170 mm Depth 134 mm Package width 95 mm Weight 120 g Operational conditions Operating temperature (T T) 5 45 °C Packaging content Carrying case Yes Receiver included Yes Quick start guide Yes Batteries included Yes Item model number: DKT30CSDHPD3 providing the highest contrast of 3M Privacy Filters 8 inches ( 519 mm x 325 mm)