Infrared ADA Compliance Kit

Product Highlights

  • Up to 30 ft range line of sight
  • Operates on 2.3-2.8 MHz
  • Easy set-up, simple to use
  • Resistant to high-efficiency lighting interference
  • No radio license required
  • Meets new 2010 ADA accessibility guidelines
  • 5-year warranty (90 days on accessories)
  • 2-year warranty on WIR250 (90 days on accessories)


Ideal for Secure Applications. This small-area infrared kit provides everything necessary to accommodate individuals for hearing accessibility and/or language interpretation in small-group settings such as jury rooms, council chambers and small hotel conference rooms. This portable, easy-to-use kit satisfies ADA requirements for multiple-room facilities.

System Includes

(1) WIR 250 small-area infrared system 

(1) BAT KT6 AA battery and charger kit 

(2) WIR RX22-4 infrared receivers 

(2) HED 026 headphones 

(1) NKL 001 neckloop 

(1) MIC 049 conference microphone, for use in large conference settings

(1) WCA 007 WC microphone extension cable 

(1) CCS 030 system carry case 

(1) IDP 008 ADA wall plaque

Ada ir kit


  • Up to 30 ft range line of sight
  • Operates on 2.3-2.8 MHz
  • Easy set-up, simple to use
  • Resistant to high-efficiency lighting interference
  • No radio license required
  • Meets new 2010 ADA accessibility guidelines
  • 5-year warranty (90 days on accessories)
  • 2-year warranty on WIR250 (90 days on accessories)


Jury rooms
Small meeting rooms
Council chambers
Parent/Teacher conferences
Small hotel conference rooms
Consultation rooms
Information desks


HED 026


Rear-wear, mono headphones


3.5mm mono



Driver Size

30 mm

Nominal Impedance


Freq. Response

20 - 20kHz



Max Power Input

100 mW


108 dB @ 1kHz

Replacement Pads

HED 023 (one pair)

MIC 049




33 g (1.2 oz)


3.5mm mono



Phantom Powered


Nominal Impedance


Operating Voltage

1.2 - 10VDC

Freq. Response

100 - 8kHz

Pick-Up Pattern


Transducer Type

Electret Cond


-38dB ± 3dB


90 days

WIR 250

Size, Weight, Color 6.25" L x 4" W x 1.4" H (15.9 cm x 10.2 cm x 3.6 cm), 5.5 oz (177 g), Gray
Power Input 12 VDC (center is positive) on DC connector, 200 mA Class II wall transformer
TFP 041 Power Supply North America: 120 VAC, 60 Hz, UL/CSA
Subcarrier Frequency 2.3 MHz, 2.8 MHz, or stereo
Range 30ft (9m) line-of-site
Auto Power On/Off Transmitter shuts off infrared after 5 minutes when audio signal is removed. Battery charging functions remain on full time.
Microphone Input 3.5 mm jack for MIC 084 Electret TV Microphone, 1.5 k1/2
Line Inputs 2 RCA jacks for mono or stereo line-level sources. 200 mV min. to 10 V rms max. input level, 5.1 k1/2
Automatic Level Control 35 dB compression range
Infrared LEDs, Pattern 6 IR LEDs, 45 degree cone-shaped coverage pattern to 6 dB intensity, 30 ft (9 m) line of sight
Charging Ports Charges one WIR RX240/250 Receiver plus two additional BAT AP07D NiMH battery packs
Approvals RoHS, WEEE

WIR RX22-4N Architectural and Engineering Specifications

  • The receiver shall be a body-pack type with IR detector lens behind face of the unit.
  • The unit shall have a lanyard for hands-free operation.
  • The receiver shall have a rotary-type volume control.
  • The receiver shall operate for 60 hours with two AA alkaline batteries and for 30 hours per charge with NiMH AA batteries.
  • The receiver shall be charged without battery removal via charger contacts in the case. A drop-in charger accessory shall recharge the batteries in 16 hours when used with CHG 3512 charger.
  • The receiver shall be housed in an impact resistant plastic case with a hinged battery door that does not separate from the receiver.
  • The receiver shall receive 2.3 MHz, 2.8 MHz, 3.3 MHz or 3.8 MHz modulated IR signals with 50 µS de-emphasis. The receiver shall have a 3.5 mm stereo phone jack and accommodate low-impedance mono or stereo earphones and headphones.
  • The receiver shall accommodate neckloop telecoil couplers.
  • The receiver shall provide 125 dB SSPL90 output with HED 021 headphone and 110 dB SSPL90 with EAR 013 earbud-type earphone.
  • The system electrical frequency response shall be 25 Hz to 16 kHz, +1, -3 dB and the S/N ratio shall be 60 dB.
  • The receiver shall have CE, FCC RoHS and WEEE approval. The receiver shall be covered by a five-year parts and labor warranty, excluding earphones, headphones, batteries and chargers.
  • The receiver shall be the Williams Sound model WIR RX22-4.


Receiver Style:

Body-Pack, dual-lens detector, lanyard


4.1" L x 2.85" W x 1.2" H (104.1 mm x 72.4 mm x 30.4 mm)


4.5 oz (127 g) with batteries

Color and Material:



3 ft (0.91 m), allows receiver to be worn around the neck

Operating Temperature:

-10° C to +50° C

Battery Type:

2 x AA, alkaline (BAT 001-2) or NiMH (BAT 026-2)

Battery Life:

Alkaline: 60 hours, NiMH: 30 hours/charge

Battery Drain:

25 mA, nominal

Charging Contacts:

For use only with CHG 3512

Carrier Frequency:

Channel 1: 2.3 MHz, Channel 2: 2.8 MHz

Channel 3: 3.3 MHz, Channel 4: 3.8 MHz


50 uS

FM Deviation:

±50 kHz

Signal-to-Noise Ratio:

60 dB min.


Receiver squelches (mutes) at 40 dB S/N ratio

Frequency Response:

25 Hz to 16 KHz, +1 dB, -3 dB, electrical response

Total Harmonic Distortion:

Less than 1%, electrical response


ON/OFF/VOLUME: combination thumbwheel knob

Channel Selector: four-position rotary switch


Red LED “ON" indicator, flashes to indicate Low battery

Audio Output Jacks:

3.5 mm stereo mini phone jack Accepts 3.5 mm mono or stereo phone plug

Audio Output Power:

15 mW max at 32 Ω

Acoustic Output:

125 dB SSPL90 with HED 021; 110 dB SSPL90 w/ EAR 013


Better than 1 nW/cm2 for 40 dB signal-to-noise ratio




5 years on receiver, 90 days on accessories

Compatible Headphones/Earphones:

Mono or stereo, 8-32 ohms, 3.5 mm mini phone plug, HED 021, HED 026, EAR 013, EAR 014, EAR 022, NKL 001


Download/View Name Type Language
Infrared ADA Compliance Kit Specifications Specifications English
CHG 3502 Manual Manuals English, Español, Français
Infrared ADA Compliance Kit Sell Sheet Sell Sheets English
ADA Hearing Assistance Plaque Manuals English
Infrared ADA Compliance Kit Manual Manuals English
WIR RX22-4 Manual Manuals English


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