Frequencies are measured with a built in electronic transducer & moving coil indicator. The movement of meter can be of 90° or 240°. The pointer is used to depict the frequency as in all moving coil metersFrequencies are measured with a built in electronic transducer & moving coil indicator. The movement of meter can be of 90° or 240°. The pointer is used to depict the frequency as in all moving coil meters. Frequencies are measured with a built in electronic transducer & moving coil indicator. The movement of meter can be of 90° or 240°. The pointer is used to depict the frequency as in all moving coil meters