Avoid unwanted interference from your existing wireless units.

Transmitter
*For fixed frequency systems*Be sure to select the correct frequency for your transmitter by consulting your system for a numbered or lettered channel sticker with the frequency listed in MHz. This can usually be found on the receiver’s body or in the battery compartment of the transmitters. Then, choose the matching frequency in the drop down menu before adding to your cart one transmitter at a time for checkout. Keep in mind that no two transmitters on the same frequency can operate simultaneously, as you will hear some undesirable noise symptoms.
Receiver
*For fixed frequency systems*Be sure to select the correct frequency for your replacement receiver by consulting your system for a numbered or lettered channel sticker with the frequency listed in MHz. This can usually be found on the receiver’s body or in the battery compartment of the transmitters. Then, choose the matching frequency in the drop down menu before adding to your cart for checkout. Keep in mind that no two receivers on the same frequency can operate simultaneously, but as you will pick up the audio from one transmitter on both systems (only one transmitter can operate on a frequency at any given time)
Systems
*For fixed frequency systems* When adding additional same-model systems to your existing equipment, be sure to select the correct frequency/s for your new system by consulting your existing system for a numbered or lettered channel sticker with the frequency/s listed in MHz. This can usually be found on the receiver’s body or in the battery compartment of the transmitters. Then, choose a different operating frequency/s from your existing equipment in the drop down menu before adding to your cart for checkout. Keep in mind that fixed frequency systems tuned to the same channels cannot operate simultaneously in the same area, as you will pick up the audio from one transmitter on both systems, and two transmitters on the same frequency will interfere with each other. The maximum multi-system receiver count in fixed frequency systems varies depending on the model and available predetermined frequency tunings.