The WilsonPro 311234 Indoor Wall Mount Antenna 50 Ohm is a wide-band indoor antenna built for use with Wilson/weBoost cellular signal-booster systems, used either as the outside donor antenna that picks up the carrier signal or as an inside distribution antenna that rebroadcasts the amplified signal into a room or vehicle. It's built for 50 Ohm signal-booster systems. It's sized and connectorized to match the signal-booster kit it's ordered alongside.