What is the PMLN8191A Surveillance Earpiece?
The Motorola PMLN8191 is a single-wire surveillance earpiece with a clear acoustic tube, an in-line push-to-talk (PTT) button, and an integrated microphone. It connects to compatible Motorola radios through a 2.5mm angled single-pin connector and is designed for discreet receive-and-transmit communication. It is compatible with the Motorola Curve.
On this page
- Overview
- Specifications
- What's in the box
- Who this product is for
- Key features
- Frequently asked questions
- Related products and resources
Overview
The PMLN8191 is a covert-style audio accessory for two-way radio users who need to hear and speak without removing the radio from a belt or holster. A single coiled cable runs from the radio's accessory port to an in-line module that houses both the microphone and the PTT button; from there, a clear acoustic tube carries audio to a soft rubber eartip worn in the ear.
Because the wiring and electronics stay concealed under clothing, the only visible component is the translucent tube at the ear. This makes it a common choice in customer-facing and security roles where a full headset or a speaker microphone would be conspicuous or disruptive.
Specifications
| Specification | Detail |
|---|---|
| Manufacturer part number | PMLN8191A (also referenced as PMLN8191) |
| Product type | 1-wire (single-wire) surveillance earpiece kit |
| Operation | Receive and transmit |
| Microphone | Integrated in-line microphone (PTT-on-mic design) |
| Push-to-talk | In-line PTT button on the microphone module |
| Connector type | 2.5mm single pin, angled |
| Audio delivery | Clear acoustic tube with replaceable soft rubber eartip |
| Cable | Coiled cable |
| Radio compatibility | Motorola Curve |
| Warranty | 1-year limited manufacturer warranty |
What's in the box
The PMLN8191 ships as a single assembled surveillance kit consisting of:
- One single-wire earpiece assembly with a clear acoustic tube and rubber eartip
- One in-line module combining the microphone and PTT button
- One coiled translucent cable terminating in a 2.5mm angled single-pin connector
Who this product is for
The PMLN8191 is used wherever staff need to communicate quietly while staying mobile and keeping their hands free. Common settings include:
- Retail and loss prevention: floor associates, greeters, and security staff who need to relay information without broadcasting it over a speaker microphone on the sales floor.
- Hospitality: front desk, concierge, valet, and event staff in hotels and venues where a discreet earpiece keeps communication out of guests' earshot.
- Security and surveillance: guards and event security who need to monitor a channel continuously and respond quickly while keeping the radio concealed.
- Restaurants and bars: hosts, managers, and door staff coordinating seating, wait times, and crowd flow.
It is a fit for single-ear, single-channel use. Teams working in very high-noise environments, or those who need dual-ear isolation, may be better served by an over-the-ear earpiece or a heavy-duty headset.
Key features
- Single-wire design that keeps cabling and electronics concealed under clothing
- In-line microphone and PTT button combined in one module for one-handed transmit
- Clear acoustic tube with a replaceable soft rubber eartip
- 2.5mm angled single-pin connector for a low-profile fit at the radio's audio port
- Coiled translucent cable that extends and retracts with movement
- Supports both receiving and transmitting through the connected radio
Frequently asked questions
Which radios is the Motorola PMLN8191 compatible with?
The PMLN8191A is compatible with the Motorola Curve.
Is the PMLN8191 a 1-wire or 2-wire earpiece?
It is a 1-wire (single-wire) earpiece. A single coiled cable carries audio to the ear and houses the in-line microphone and PTT in one module.
What type of connector does it use?
The PMLN8191 uses a 2.5mm single-pin connector with an angled body, which plugs into the audio accessory port on compatible Motorola radios. Radios that use a different connector, such as a threaded or multi-pin side connector, are not compatible without an adapter.
Can you both hear and speak with this earpiece?
Yes. The PMLN8191 supports both receive and transmit. You hear incoming audio through the acoustic tube and eartip, and you transmit by pressing the in-line PTT button while speaking into the integrated microphone on the same module.
Are the acoustic tube and eartip replaceable?
Yes. The clear acoustic tube and the soft rubber eartip are replaceable wear parts. Replacing them periodically is recommended for hygiene in shared-use settings and to maintain consistent audio when a tube becomes cracked or clogged.
Is this earpiece suitable for loud environments?
It is suitable for typical retail, hospitality, and security noise levels and delivers enhanced audio through the acoustic tube. In sustained high-noise environments, an over-the-ear earpiece or a heavy-duty headset that covers or seals the ear will generally provide better intelligibility.
Related products and resources
Related products at Tech Wholesale:
- Motorola Curve Digital Two-Way Radio
- Motorola PMLN8190 Surveillance Earpiece (for CLP1010e / CLP1080e)
- Two-Way Radio Earpiece Options
Manufacturer and reference sources:
