Motorola HMN4101 IMPRES Remote Speaker Microphone
Model Number:  HMN4101
The HMN4101 is a rugged remote speaker microphone with volume control, two programmable buttons and an orange button. It is designed with a large speaker that delivers audio that is clearer, more intelligible and up 50% louder than XTS-series RSMs. Meets rugged specifications for submersibility and includes a rugged, submersible audio jack.
Intrinsic Safety Standard