Forest Green
Glow In The Dark
Safety Pink
Safety Orange

Adds Bluetooth™ wireless technology to the features included on the APX373. Pair your mobile phone to make phone calls or listen to music or connect with your enterprise Bluetooth enabled device, all while providing advanced hearing protection. Independent adjustable volume levels for listen-through and ear dome speakers allow you to control what you hear. With wireless Bluetooth, wired portable two-way- radio connectivity and an integrated personal sound dosimeter, this wireless headset provides unparalleled features and safety. Watertight and verified and validated to perform in extreme environments, the APX375 protects your hearing while you get the job done.


  • Wireless Bluetooth to your cell phone or enterprise device
  • PR-Adapter to any portable two-way-radio
  • Stereo Listen Thru with users not on the same network


  • Stereo Listen-Through – We have found the most common issue with hearing protection is the isolation users feel when wearing them. We added Stereo Listen-Through to all of our Apex 3-Series headsets for critical situational awareness.
  • 20dB NRR – With 20dB of certified NRR protection, our headsets are ready to go where you need to be.
  • Personal Sound Dosimeter – Hearing protection is nothing if it’s just a guess. This is why we added a personal sound dosimeter to every Apex 3-Series headset. Know you are wearing the headset correctly and have the protection.
  • Active Sound Management – We manage sounds from all communication sources to ensure optimal clarity and protection. This is done with the noise canceling and auto-leveling microphone, automatic loud noise suppression, and personal sound dosimeter with automatic input gain adjustments.

We know your job may take you anywhere so we designed our headset to go anywhere you do.

  • Marine – Sealed against salt spray and moisture.
  • Winter – Operation down to -22°F (-30°C).
  • Summer – Operation up to 158°F (70°C).
  • Accident – Drop tested to 13 feet (4m).
  • Cleanliness – Easy to clean surfaces.


  • Silicone Ruggedizers – Know at a glance who is who on the job. Define teams, roles, communication profiles or individuals. Adds extra impact protection and abrasion resistance.
  • Headset Ruggedizer Colors


  • Portable DECT7 Systems
  • Installed DECT7 Systems
  • Enterprise DECT7 Systems

Adjustable Volume Control – Programmable and real-time adjustable user volume control. Returns to the last setting at power-up.        

Auto-Leveling Microphone – Automatically detects your voice against background noise enabling an automatic VOX (noise gate or squelch) that needs no adjustment when transitioning between areas of differing noise levels.

Automatic Loud Noise Suppression – Limits high impulse sounds such as gun shots when using the Stereo Listen-Through feature.        

Convertible Headband – User-configurable for overhead, behind-head, or hard hat (with hard hat accessory). Change the way you wear your headset from one job to the next.
Silicone Ruggedizers – Define teams or roles, and enhance safety. Adds additional abrasion and impact protection. Available in many standard and custom colors (sold separately).

Extreme Environmental Design – With an IP-66 dust and water ingress protection rating, Apex 3-Series headsets continue working even when hit with a fire hose, worn in a downpour or left out in the dust and sun of a job site. Verified operation to -22°F (-30°C) for extreme cold weather environments.

Hearing Protection – Conforms to many of the required hearing protection standards protecting the user from harmful noise.

In Headset Charging – Charge from multiple sources, including the supplied AC wall adapter. DC charging from most cars, trucks, and aircraft. Refer to specifications for charging voltages and power requirements.

Light Weight – Use of the latest weight-saving technologies delivers a wireless headset that is lighter and more comfortable for extended use than many wired communication headsets.

Listen-Through Situational Awareness – Stereo Listen-Through microphones give the wearer full situational awareness. Microphones placed on the forward edge of each ear dome provide the perception of sounds in the front versus from the rear. The Listen-Through feature has an independently adjustable volume level and automatically limits all sounds to a maximum of 82dB.

Long Battery Life – Over 44 hours of battery life on Apex 3-Series Personal Headsets means they are ready to work whenever you need them.

Multilingual Voice Prompts – Hear voice prompts in your preferred language. Ships with American English installed. Spanish available as a factory-installed option.

Multimode Auto Shutdown – Extends battery life. All shutdown timers have a voice prompt announcement and may be cancelled by pressing any button.

Noise Cancelling Microphone – Lets you hear the person talking by removing distracting background noise at the microphone.

Personal Sound Dosimeter – Measures and records sound levels inside the ear cup cavity over a period of up to 24 hours to ensure compliance with noise exposure limits. Remembers the Time Weighted Average even when turned off (memory will reset after being turned off for 6 hours), and averages the last 24 hours continuously. Programmable audible alerts send a voice prompt to the user notifying them of the last 24 hours of exposure. The system automatically adjusts the various inputs (Listen-Through, AUX, Bluetooth, and side tone) to ensure compliance with hearing protection standards. For reference use only.

Radio PTT – The headset interfaces with any two-way portable radio using the wired AUX input connection.

Two Stage Low Battery Alert – Audible alerts sound at 25-50% remaining battery level, and again at less than 25%.

USB Programmable – Use the integrated USB port to configure your headset with a Windows PC. Many features may be customized and saved from the program. Refer to the Sonetics Headset Program for details.

User Replaceable Battery – Replace the battery at end-of-life. Maintain a spares pool for extended operating time.

Voice Prompts – Make any adjustment without removing your headset. No need to look for lights, text, or knob positions. Voice prompts automatically adjust volume to ensure intelligibility in changing environments.

Wired Line-in – Connect to cell phones, handheld radios and other mobile devices. The wired connection features a mono input and output with PTT. Browse for additional accessories to match your equipment.

Over Head: 15.8oz / 448g | 17.8oz / 504g with Ruggedizers
Behind Head: 16.2oz / 458g | 18.1oz / 514g with Ruggedizers

Battery: 3.7V rechargeable lithium ion
Battery Life: >44 hours @ 25°C
Protection: Over voltage, under voltage, over current and over temperature protection
AC Charge source: Supplied 12VDC, 500mA wall charger
DC Charge source: 5VDC to 16VDC, 0.5A minimum
Charge Time: <4 hours for fully discharged battery

Operating temperature: -22°F to 140°F / -30°C to 60°C
Storage temperature: -4°F to 122°F / -20°C to 50°C
Charging Temperature: 32°F to 113°F / 0°C to 45°C
IP-Rating: IP-66 (Dust tight, sealed against salt spray and moisture)

FCC Part 15

Conducted Transients: 7637-2
Quality Management System Control: ISO 9001:2008

Chemical Exposure: Intermittent Exposure MIL-STD 810 Method 504:
Isopropyl alcohol, Formula 409®, WD-40®, Windex®, Bleach/Water (1:1), Mineral oil, Synthetic Sweat, Jet A Fuel, Kerosene, Gasoline, Deicing (Ethylene or Propylene Glycol mixtures), Potassium-Acetate based solution, Ansulite.
Humidity: MIL-STD 810F and 810G
Temperature Shock: MIL-STD 810F and 810G

Behind Head NRR Rating: 20dB
Over Head NRR Rating: 20dB

Patents Pending

Conducted Immunity: J1113-11
Electrostatic Discharge: J1113-13
Radiated Emissions: CISPR 25
Radiated Immunity: ISO 11452-2
Salt Spray: J1455, Sec. 4.3
Vibration: J1455 Sec. 4.9

UL1642 Standard for Lithium Batteries

UN38.3 UN Transportation Testing for Lithium Batteries

View the product sheet:

APX373 Product Sheet

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