Firecom UHW503 Intercom-Only Under Helmet DECT7 Wireless Headset

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Radio transmit is permanently disabled on this rugged, weatherproof wireless headset that features DECT7 wireless technology for improved sound quality in the apparatus and on the fire scene. Extended range and coverage let you communicate clearly with crew members up to 1,000 feet from the apparatus. Auto-On activates the headset on removal of the charging cable. An automatic noise gate provides set-and-forget ease of use for seamless transitions between high- and low-noise situations, and a new ergonomic design delivers enhanced comfort and wearability.

  • firecom UHW503 wireless headset

    Firecom UHW503 Intercom-Only Under Helmet DECT7 Wireless Headset

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    •  Delivery & Return


      All items are shipped via UPS unless otherwise noted. Oversized items may need to be shipped via LTL. Overnight shipping is available when requested. All shipping charges are calculated at checkout or will be added to your quote.


      You may return your stock item purchase for exchange or refund up to 30 days from date of invoice.  Prior to returning any items, please contact us for an RGA (Return Goods Authorization) number. Proof of purchase from Allstar is required for all returns. All returned goods must be in original packaging and in new and sellable condition. Custom and Special Order items are subject to the manufacturers return policy.  Some manufacturers require a re-stock fee for return which is deducted from your refund. Freight must be prepaid on all returns.


      Please contact us if you have any other questions and/or concerns. Email: Toll Free: (800) 425-5787
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      firecom UHW503 wireless headset

      Firecom UHW503 Intercom-Only Under Helmet DECT7 Wireless Headset

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      Adjustable Volume Control – The headset has a programmable and real-time adjustable user volume control. The Headset will remember the last setting at each power up for convenience.

      Auto-Leveling Microphone – The headset automatically detects the voice of the user against the noise in the background. This allows the headset to have an automatic VOX (noise gate or squelch) that needs no adjustment when transitioning from areas of differing noise levels.

      Silicone Ruggedizers – Define positions or roles with these colorful ruggedizers. Fits over each ear dome to provide additional impact and abrasion resistance. Available in 14 standard colors (sold separately).

      Extreme Environmental Design – Despite the rain, snow, mud and soot, the UHW503 performs when you need it most. Operates to -22°F/-30°C for extreme cold weather environments.

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

      In Headset Charging – The powered Headset has charging circuitry built in and is ready to be charged from multiple sources. These include the supplied AC wall adapter and DC charging options from a variety of sources including most cars, trucks, and aircraft. Refer to specification for charging voltages and power requirements.

      Light Weight – Through the use of the latest weight saving technologies, Firecom is able to deliver a wireless headset that is lighter than many wired communication headsets.

      Long Battery Life – With over 24 hours of battery life on DECT7 Headsets, the headsets work whenever the user needs it.

      Multimode Auto Shutdown – For user convenience, the Headset is designed with multimode auto shutdown to extend the life of the batteries. All of the shutdowns have a verbal announcement and may be cancelled by the user by pressing any button.

      Noise Cancelling Microphone – The microphone is a noise cancelling type designed to remove the background noise right at the mic element. This allows listeners to hear the person talking and not the background noise.

      Two Stage Low Battery Alert – The powered headset has a two stage low battery alert system to notify the user when battery is nearly depleted. This allows the user to have adequate notice before loss of communications.

      USB Programmable – The headset has a built in USB port to configure your headset with a Windows PC. Many of the features may be customized and saved from the program. Refer to the Firecom Headset Program for details.

      User Replaceable Battery – The powered headset uses a replaceable battery. This allows the user to replace the battery at end of life and have spares in the field for extended operation times.

      Voice Prompts – The voice guided menu prompt system allows the user to make all adjustments without removing the headset. There is no need to look for lights, text, or knob positions. The voice prompts automatically adjust volume to ensure intelligibility in changing environments.

      Wired Line-in – The wired line-in is used to interface with cell phones. This gives the user another source for flexibility in their communication needs. The wired connection features a mono input and output with PTT output. See your Firecom dealer for accessories to match your equipment.

      Wireless DECT7 Communications – The headset features a wireless DECT7 communication channel enabling full duplex communication, like a conference call, to others on the same channel. Firecom wireless DECT7 headsets connect with the Firecom WB505R Wireless Base Station. The DECT7 communication network gives the crew members up to 1,600 feet line-of-sight range to the wireless base. The standard further ensures interference free and digitally encrypted communications.

      Wireless DECT Backwards Compatibility – The wireless headset is backwards compatible with the Firecom first generation wireless DECT and DECT6 Wireless Base Stations with minimal loss in functionality.

      Wireless DECT7 Broadcast Mode – Connect in listen-only mode allows up to 100 DECT7 headsets to be connected to a WB505R Wireless Base Station simultaneously. Pressing the PTT button allows the headset to momentarily talk on any available open slot on the base station. A tone will let the user know when they can talk. Refer to the WB505R manual for details.

      Wireless DECT7 Dual Dome Antenna Design – Each dome has a separate DECT7 antenna using diversity switching to lock onto the best signal. This means the user doesn’t need to worry about head position relative to the wireless base and the best possible connection is delivered at all times.

      Wireless DECT7 Encryption – using the latest digital encryption available, the DECT7 headsets ensure your conversations are private.

      Wireless DECT7 Out of Range Warning – The headset notifies the user via voice prompt when the wireless connection is weak, or when it appears to go out of range from the Wireless Base Station.

      Wireless DECT7 Wide Band Audio – The wireless DECT7 communications are transmitted in a high definition wide band audio format. This allows greater intelligibility of the user and integration with voice activated control systems. This feature is defeatable to allow the user to be in a narrow band audio communication.

      DECT7 Wireless Technology

      • Dynamic channel allocation
      • DECT Standard Cipher with 35-bit initialization vector
      • Frequency Bandwidth: 1920 MHz to 1930 MHz


      • Weight: 16 oz. (without ruggedizers)
      • Color: Black
      • Noise Reduction Rating: 24dB NRR
      • Side Pressure: 2.2 lbs.


      • 3.7V rechargeable lithium ion battery (18650 replaceable)
      • More than 24 hours of battery life at 77°F (25°C)
      • Charge time: 4 hours
      • AC Charge Source: supplied 12V, 500mA wall charger
      • DC Charge Source: 5V to 16V, 0.5A minimum, cable supplied
      • Over voltage, under voltage, over current and over temperature protection


      • Operating temperature: -40°F (-40°C) to +140°F (+60°C)
      • Storage temperature: -40°F (-40°C) to +185°F (+85°C)


      • Humidity per MIL-STD 810F and 810G
      • Temperature Shock per MIL-STD 810F and 810G
      • Chemical Exposure per MIL-STD 810


      • Salt Spray per J1455, Sec. 4.3
      • Vibration per J1455, Sec. 4.9
      • Conducted Immunity per J1113-11
      • Electrostatic Discharge per J1113-13
      • Radiated Emissions per J1113-41


      • Conducted Transients per 7637-2
      • Quality Management System ISO 9001:2015

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