Connector Port: BNC, Before making a purchase, please make sure that the antenna's model, specific parameters, port type match the product ^^
Frequency: 450-470MHz, Gain: 4dBi ^^ Length 11.4" /29cm ^^ Soft Rod BNC Antenna Compatible with Topcon GR3, GR5, Hiper+, GGD GPS RTK Surveying Instrument ^^ 5 Pack BNC Antenna