The HMN4103 is the basic version of the display microphone with volume control, two programmable buttons and an orange button. Its 8-character display mimics the top display to show zone and channel information at a glance. It is designed with the same speaker used in the APX 7000 portable radio and delivers audio that is clearer, more intelligible and up 50% louder than XTS-series RSMs. Meets rugged specifications for submersibility and includes the first rugged, submersible audio jack from Motorola.