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: ①.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. ②.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.