Standard/Approvals

FM :   Yes
CE : Yes
Cenelec : No

FACTORY MUTUAL APPROVED ONLY WITH THE HT750,
HT1250, MTX850, MTX8250, GP SERIES RADIOS

Users in other countries - check local approvals

Features & Benefits

Motorola original accessory. High quality and durability product.

This surveillance accessory allows the user to privately receive communications with the
earpiece and are ideal when environments require discreet communication. A simple, cost
effective, listen only earpiece that provides all users, especially  the first time user, with the
ability to listen to radio messages without them being overheard.

Receive Only Earpiece without Volume Control (black)—FM approved, (1 wire).

Discrete Listening
Good in Noisy Environments
Unobtrusive

Optional NTN8370 Extreme Noise Earpiece Adapter Kit, Noise Reduction Rating = 24dB,
for use with AARMN4021, AARMN4022, AARMN4028, AARMN4029,
ENMN4014 & ENMN4017 earpieces - order separately.

Optional NTN8371 Low Noise Earpiece Adapter Kit
(for use with AARMN4021, AARMN4022, AARMN4028, AARMN4029,
ENMN4014 & ENMN4017 earpieces), order separately.

Clear comfortable earpieces can be also added for extra comfort (order separately):

RLN4760A Small Custom Earpiece, right ear
RLN4763A Small Custom Earpiece, left ear
RLN4761A Medium Custom Earpiece, right ear
RLN4764A Medium Custom Earpiece, left ear
RLN4762A Large Custom Earpiece, right ear
RLN4765A Large Custom Earpiece, left ear

Radio Compatibility

Product compatible with these Motorola two-way radios:

GP1280
GP140
GP240
GP280
GP328
GP329
GP338
GP339
GP320
GP340
GP360
GP380
GP540
GP580
GP640
GP680
HT1250
HT1250LS
HT1250LS+
HT1550
HT1550LS
HT1550XLS
HT750
MTP700
MTX8250
MTX8250LS
MTX850
MTX850LS
MTX900
MTX9250
MTX950
MTX960
PRO5150
PRO5350
PRO5450
PRO5550
PRO5750
PRO7150
PRO7350
PRO7450
PRO7550
PRO7750
PRO9150
PTX700
PTX760
PTX780
Other WARIS portable radios

Additional Information:

Same as Motorola part RMN4028, MDRMN4028.

Noise rated:  N/A
Dimensions:  N/A
Color:  Black

FM (Factory Mutual) Ratings

Intrinsic safety is only met when used with the approved radio models,
approved accessories and options. Check your radio for the intrinsically
safe label. The label will identify the rating to be used with your approved
portable unit.

IF the above chart DOES NOT indicate approvals, then the product
listed IS NOT intrinsically safe (IS) or FM Approved.

For reasons of liability, we cannot advise our customers what ratings
of radio equipment they would need for their work environment.
They would need to research it themselves.