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IT-31 ISOTunes Link Earmuff EN352


Attenuating Earmuff – over the head/ear with Bluetooth connectivity in Safety Orange

Hearing protection device that allows the wearer to accept phone calls or stream music via Bluetooth paired devices.

Headset Weight:- 440 grams

This product has been tested and approved to EN352-1. It also complies with the latest RoHS, WEEE, FEC &CP65 standards.

Notified Body:- BSI Group - The Netherlands B.V. PZT 1974


SNR - 30 dB

HML  H = 34dB   M = 27dB   L = 21dB

Technical Specification:-

EN 352-1:2002 Hearing protectors - General requirements - Part 1: Ear Muffs

EN352-8:2002 Hearing Protection – Entertainment Audio Ear Muffs

PPE Regulations 2016/425

ANSI S2.19 1974

The EU declaration of conformity can be accessed at

Bluetooth V4.2 Technology

Bluetooth Profiles supported:- HSP, HFP, A2DP, AVRCP

Supports iOS Bluetooth battery level indicator.

Transmission power:- Class 2

Operational range:- Up to 10 meters/30 feet

Lithium Ion rechargeable battery (included). 14* hours Music streaming/Talk Time. Standby time 37* hours.

Optional 3 x AAA batteries (not included). 28* hours Music Streaming/Talk Time. Standby time 64.5*


*Times vary depending on usage

Micro USB charging for Lithium ion battery.

Charging Voltage:- DC4.75 – 5.25 Volts. Only use a charge of 5 Volts/1 Amp output maximum. Using a charger higher than 5 Volts/1 Amp output could be dangerous and may damage the headset.

Battery details:-

Type:- Lithium ion.

Number:- 1

Weight :- 10 grams

Number of cells per battery :- 1

mAh per Battery :- mAh 500

Watt Hours per Battery :-1.85 Wh

Charging Time:- Approximately 2 - 3 hours

Battery Saving - auto shut off after 4 hours.


Noise Isolating Microphone blocks out steady state noise for clear calls in loud environments

Type - ECM Omni Directional

Frequency Range – 20Hz to 20kHz


Frequency range – 20Hz to 20kHz

Impedance – 32 Ω

Other Features..

Dual connectivity. The Headset can be paired to two Bluetooth devices at the same time.

SafeMax Technology delivers exceptional audio quality while limiting the volume output to 79 dBA.

Dust, sweat & water resistant IP45.

This product does not support aptX enhanced audio quality streaming.


Replacement Hygiene kit available reference IT-83

IT-31 ISOTunes Link Earmuff EN352

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