PTX-3 12/29/2017 Category: Products, UHF Wireless IFB, Transmitter, UHF IFB Wireless Operate between 486.4 and 639.9MHz Stand alone or rack mountable with the PRK-2 kit Selectable Low-Frequency roll-off “Locked” setting prevents accidental changes Overcomes channel noise and compandor artifacts Tough machined aluminum case housing