ExternalAntenna helps overcome barriers to radio signals in challenging environments, such as safe boxes, reinforced concrete rooms, or metal enclosures. Place the signal transmitter or receiver beyond obstacles to improve signal strength in Jeweller, Wings, and cellular channels and get a more reliable and stable connection. If the ExternalAntenna cable is cut or severed, you will receive an instant alert.Features:-Communiacation Channels.-Overcomes any signal obstacles with a 3m cable.-Breakage detection.-Easy to connect and monitor the connection status.-Installed using a double-sided adhesive tape.