PMMN4149A PMMN4149 - Motorola RM110 Remote Speaker Microphone, without 3.5mm Audio Jack (IP55) The RM110 is a compact and durable windporting remote speaker microphone featuring a loud speaker has a good level of protection against dust & water (IP55 rated - RSM head only). The RM110, small wired RSM features a compact design and is equipped with a sturdy low profile swivel clip. It has a loud and clear 101 phon speaker to ensure clear audio transmissions. This RSM is IP55 rated.