This batch of radios were originally programmed for use with with handsets so the audio goes through the mic cord instead of the speaker. So, when you reprogram it with your frequencies, make sure to change the audio to go through the speaker. Once more, THE RADIOS WORK PERFECTLY FINE, THE AUDIO JUST NEEDS TO BE RESET. The Motorola Radius CM200 VHF Mobile Radio is a reliable and durable two-way radio communication device with 4 channels to program and for memory.