High quality antennas, for outdoor use, are perfectly adjusted to the frequency of work. Its impedance is 50 Ohm. They are supplied with 2.5 m of ... Antennas of great quality, for outdoor use, are perfectly adjusted to the frequency of work. Its impedance is 50 Ohm. They are supplied with 2.5 m of RG58 cable. The antenna C-0509 is of the vertical type. The rod of 135 mm. It is black steel. It is adjusted for 433.92 MHz and is fixed by means of a nut that is included: The C0510 is of the Ground Plane type, omnidirectional, for 433.92 MHz. It has the aluminum body and the chrome-plated brass radials.