Features: Support Maximum coverage area is 200 square-meters.( for Depend-on the area-condition) One indoor antenna only use for about 30-100 square-meters in open space. (The indoor and outdoor antenna quality depends on the indoor signal coverage area.) Application Scope:Small regions of signal or weak signal blind area, such as underground-or semi-underground place of business, basements, underground-parking, etc. Complaints from small-scale hot-signal areas, such as conference-rooms, a small supermarket, small shopping malls, the-office and small public areas, etc. Traffic and social influence of large areas, such as bars, dance halls, fitness clubs, leisure and entertainment, etc.;Home, office, luxury-achts, private for car, public security system and road-safety management, etc. Specifications: Material:Metal Size:Approx.14x10cm/5.51x3.93inch Color:Black/White Voltages : 110-220VAC or DC5V1A Frequency-range : 900MHz--915MHz ( UPLINK ) 935MHz--960MHz ( DOWNLINK ) Gain: Uplink: 55dBi Donwlink: 60dbi Output power : Uplink: 17dbm Donwlink: 17dbm Ambient temperature: -10C-50C Impedance: 50Ohm Package Includes: 1x 900MHz Booster 1x Indoor Antenna N-Male 1x Outdoor Antenna N-Male with 10M Cable 1x User Manual note: .Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. .Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.