The Telethin magnetic receivers are available in 5 different impedances which permit a choice of impedance for any application. For inconspicuous use, the receiver is extremely small and lightweight.
The Telex RTX-04 is an inconspicuous flesh-colored magnetic receiver from the patented Telethin series of ENG and personal monitoring drivers, with a 1000 Ohm impedance. The Telethin drivers are a component of the Telex earsets, and are available in 5 different impedances.