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The Motorola Solutions RM110 Remote Speaker Microphone (RSM) is a robust accessory designed to enhance communication for users of portable two-way radios. This device allows for convenient hands-free operation and improved audio clarity in various environments, particularly those requiring compliance with RF energy exposure regulations.
The primary function of the RM110 RSM is to provide an external speaker and microphone for a two-way radio, allowing the user to transmit and receive audio without needing to hold the radio directly. This is especially useful when the radio is clipped to a belt or otherwise not easily accessible. The RSM features a Push-to-Talk (PTT) button for initiating transmissions and an integrated 3.5 mm audio jack for connecting an earpiece, enabling private listening.
Attaching and Detaching the RSM: To attach the RSM to the radio, the RSM connector should be inserted into the radio's side connector. The connection screw is then secured in a clockwise direction until tightened. It's important to note that connecting the RSM disables the radio's internal speaker, microphone, and PTT button. To detach, unscrew and remove the connector from the radio's side. When not using a secondary accessory with the audio jack, the dust cover should be kept inserted.
Recommended RSM Wearing Position: For optimal performance and comfort, the RSM should be worn on the user's shoulder or lapel, allowing the microphone to be close to the mouth for clear transmission and the speaker to be audible.
Transmitting and Receiving: To transmit, the user presses and holds the Push-to-Talk (PTT) button on the RSM and speaks into the microphone. To receive, the user releases the PTT button. Audio will be heard through the RSM's speaker or through an attached earpiece.
Hearing Safety: Motorola Solutions emphasizes the importance of protecting hearing from loud noise, which can cause cumulative and sometimes undetectable damage. Users are advised to:
Cable Management: To ensure optimum range and user experience, it is recommended to avoid crossing the accessory cable with the radio antenna. Proper cable routing helps prevent interference and maintains signal integrity.
Optional Accessories: An optional Rx only xL Clear Tube Earpiece (PMLN8120) with a 3.5mm jack is available for private listening.
Dust Cover Management: The 3.5 mm audio jack is protected by a dust cover.
Water Management: Despite its IP55 rating, it is crucial not to fill the audio jack with water. If water enters the audio jack, it should be removed by shaking the RSM.
Swivel Clip Attachment and Detachment: The RSM comes with a swivel clip for attaching it to clothing or gear.
Service and Warranty: Motorola Solutions offers a warranty for the RSM. Users should refer to their Motorola Solutions dealer or point-of-purchase for detailed warranty information. The warranty is void if customer replacement of any parts other than the listed replacement parts occurs.
| Brand | Motorola |
|---|---|
| Model | PMMN4148 |
| Category | Two-Way Radio |
| Language | English |












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