The WS-CK1 Wireless Upgrade Package from Califone enables you to upgrade your existing wired PA system into a wireless system and change the frequency range of a 700 MHz system to the FCC mandated 900 MHz frequency range. The package includes a HBM319 headset microphone, a WS-T wireless transmitter, a WS-R wireless receiver, and two WS-CR charging cradles with power adapters. You can plug an anchored audio source such as an MP3 player or computer into the system and wirelessly transmit it to your existing wired PA system. The transmitter provides an adjustable range of up to 300' within line of sight; it has a 3.5mm mic input to which the included HBM319 headset can be connected, and can be either worn on the hip or around the neck with a lanyard.
To upgrade your existing wired PA, simply connect the included headset mic to the transmitter and then match one of the 16 frequency channels on the transmitter to the same one used on the included wireless receiver. The final step is to connect the receiver to the "aux" or "line in" on your existing PA (connecting cable is not included).