One of the least known, but arguably one of the most important accessories for modern Motorola digital-series MOTOTRBO two way radios is the Operation Critical Wireless Bluetooth Earpiece System.
Motorola Operations Critical Wireless Earpiece Kit

Err… Operation Critical? What does that mean?

Before we explain what the wireless bluetooth earpiece system is an how it works, let’s explore what Motorola means by Operation Critical.

Operation Critical, sometimes termed as Mission Critical, is Motorola’s clever marketing way of saying unlikely to fail. That doesn’t, by any means, mean that it can’t fail. Afterall the Titanic had watertight bulkheads and was unlikely to sink. Yet it did sink – because more than the critical number of bulkheads were breached. In the same way, Motorola’s Operation Critical equipment is built to such a high standard that it’s very unlikely to fail, but if dropped so many times, it will eventiually stop working.

If you take care and look after your Motorola operation-critical equipment there is no reason that it shouldn’t work indefinitely.

Operation Critical Wireless Bluetooth Earpiece System

This wireless earpiece system is probably one of the best innovations from Motorola Solutions in recent times. There are several parts to this system. The Bluetooth Module and earpiece options. Then there are charging options. We’ll cover all these options step-by-step below.

Only For Bluetooth-Enabled Motorola Two Way Radios

At this stage it’s important to note that, in order to use the Bluetooth system, you will need a Bluetooth-enabled two way radio. Note the word enabled here. This is beause some Motoorla two-way radios are provided as capable and require licence keys (enablemnet ID codes, or EID codes) to enable the Bluetooth feature within the radio.

We have a guide on this website as to which radios are Bluetooth-capable and which are Bluetooth-enabled.

Bluetooth Logo

Bluetooth Module

At the heart of the system is the Bluetooth Module. This is the part that wirelessly connects to the radio. and contains an internal lithium battery. On the top is the on/off and Bluetooth connect switch. In the middle is the connectivity LED indicator. On the other side is the earpiece jack socket. There are only a selected numer of earpieces compatible with this module which are shown below.

Motorola Bluetooth Wireless Module

Earpiece Options

At present, there are two earpiece options for this system. The first is the PMLN6397 swivel earpiece eith a combined microphone and push-to-talk module. The second HKLN4514 is also a swivel earpiece but this one has a boom type microphone.

Note: Unfortunately, these earpieces are not available individually, ony available in packages. See the ordering guide below.

Motorola Operation Critical Wireless Module Earpieces

Ordering Guide

U.S. Model EMEA Model Description
Individual Parts
HKLN4512 PMLN6396 Bluetooth Module
HKLN4513 PMLN6397 Swivel Earpiece (Inline Mic. & PTT) aka PMLN6397, HKLN4513
HKLN4514 Boom Earpiece (Boom Mic. & Inine PTT)
Packages
PMLN7369 3x Bluetooth Module
RLN6500 Bluetooth Module, PMLN6397 Swivel Earpiece, HKLN4509 Charging Cradle, PS000132A01 US Power Supply
PMLN6463 Bluetooth Module, PMLN6397 Swivel Earpiece, Charging Dock, No PS000042A13 UK Power Supply
PMLN7181 Bluetooth Module, HKLN4514 Boom Earpiece, Charging Dock
RLN6556 Bluetooth Module, HKLN4514 Boom Earpiece, HKLN4509 Charging Cradle, PS000132A01 US Power Supply
RLN6550 RLN6550 3x PMLN6397/HKLN4513 Swivel Earpiece
PMLN7203 PMLN7203 3x HKLN4514 Boom Earpiece
Chargers
HKLN4509 Bluetooth Module single unit charger, excludes PSU.
HKLN4508 HKLN4508 Bluetooth Module charger slot for HKPN4007 (USA) and IXPN4029 (UK)