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 . Specifications: Material:Plastic Size:Approx.14x10cm/5.51x3.93inch Color:Black/White Voltage: 110-220VAC or DC5V1A Frequency: 850MHz Seclusion:> 65db Ambient temperature: -10C-50C Impedance: 50Ohm Working frequency: 850MHz Gain: 60 ± 2dB Output power: 18dBm Current: <250mA In-band fluctuation: <3dB Stray radiation: -36dBm Delay: ≥5usec Third-order intermodulation: 9K-1GHz≤-36 / 1G-12.75GHz≤-30 Standing wave: ≤1.5dB Connector type: N-K Noise coefficient: ≤5dB Impedance: 50Ω Working temperature: -10℃ -60℃ Package Includes: 1x 850MHz Booster 1x Charger 1x Indoor Antenna N-Male 1x Outdoor Antenna N-Male with 10M Cable 1x User Manual (other accessories demo in the picture is not included.) 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.