About this item The PNI ECH01 Echo and Roger Beep module is designed to work with any radio station in the CB and VHF band as an additional module. Connect the module to a computer and copy the customized audio file (MP3 or WAV, maximum duration 1.5 seconds) according to the instructions in the manual. The PNI ECH01 Echo and Roger Beep module is independently compatible with any CB or VHF radio station. Add these two new features to your transmitter and you will make a difference: your received voice will be different from others by the echo effect, and the end of your shipment is marked by an original audio signal. The PNI Escort HP 8001L CB radio has a switch on the front that allows you to select the emergency call channel (19), normal operating mode (CH) and activation of key lock function (L), a useful feature in situations where you want to avoid accidental touching of the CB remote keys. The PNI HP 8001L radio has sockets on the front for connecting a headphone with microphone included. › See more product details