Hearing Helper® FM Assistive Listening Transmitter

Product Highlights

  • Designed for the European market
  • Three-channel selectable
  • Range of up to 30 meters (98 ft.) when used with Hearing Helper® R863 receiver


The T863 is a portable, body-pack style FM transmitter with user-selectable operating frequencies of 863.25 MHz / 863.75 MHz / 864.75 MHz.  Black, ergonomic, impact-resistant case.  Belt clip included for hands-free operation. Will accommodate a variety of microphone options.

System Includes

(1) T863 FM three-channel selectable transmitter
(1) Belt clip
(2) BAT 001 AA alkaline batteries
Microphones sold separately.


NOTE: The operating frequency on the T863 transmitter is optimized for European markets. The transmitter can not be used in all countries. Check with your government´s radio regulations for 863 MHz operation.



  • Range of up to 30m (98 ft.) when used with Hearing Helper® R863 receiver
  • Integrated on/off/channel switch
  • 3.5mm mic jack
  • LED Battery ON indicator 
  • Up to 12 transmitters can be charged at once in the optional CHG 3512 multi-charger. 
  • 20 hours of use– (2) BAT 001 AA alkaline batteries
  • 15 hours of use per charge – (2) BAT 026 AA rechargeable batteries



Tours • Language Interpretation • Hearing Assistance


T863 Architectural and Engineering Specifications

  • The T863 shall be a portable, belt-pack-equipped, wide-band transmitter. The unit shall have three user-selectable operating frequencies of 863.25 MHz for CH1, 863.75 MHz for CH 2 and 864.75 MHz for CH 3. The T863 shall be housed in a black polycarbonate impact-resistant enclosure and feature a two-inch external antenna and 3.5mm mono microphone input.
  • The transmitter shall include an integrated on/off/channel selector control, an internal mic gain control, and power ON indicator LED. The power ON LED shall flash to indicate low battery.
  • The transmitter shall operate on two AA alkaline batteries for approx. 20 hours of operation or 15 hours with Williams Sound NiMH rechargeable batteries (BAT 026). The transmitter shall have drop-in charging points for charging with the optional CHG 3512.
  • The T863 shall have an operating range of approx. 30 meters (98 feet) when used with the R863 receiver and a signal ratio greater than 50dB with the R863 and 60 kHz deviation.
  • The T863 shall have CE, ETSI EN 301 357-1, ETSI EN 301 357-2 approvals, and be compliant with RoHS and WEEE regulations. The unit shall have a three year parts and labor warranty.*
  • The transmitter shall be the Williams Sound model number T863.



4.1" L x 2.8" W x 1.1" H (104 mm x 71 mm x 28 mm)


2.6 oz (74 g), no batteries


Black, shatter-resistant PC/ABS plastic

Battery Type:

Two (2) AA 1.5 V non-rechargeable Alkaline batteries (BAT 001), 70 mA nominal current drain, 30 hours approx. life

Two (2) AA 1.5 V NiMH rechargeable batteries (BAT 026), 70 mA nominal current drain, 20 hours per charge approx., recharges in 14–16 hours, uses CHG 3502 or CHG 3512 Charger

Operating Frequencies:

Selectable, 16 channels, 72.1 – 75.9 MHz* (channels 1-8 correspond with R35-8 receiver channels and PPA R1600)


± .005%, frequency synthesized, crystal reference, PLL


Wide-band FM, 75 kHz pk, 75 µS pre-emphasis

RF Output:

80 mV/m at 3 m (max. allowed by FCC rules)

Frequency Response:

200 Hz to 13 kHz, ± 3 dB at 1% max. THD

Signal-to-Noise Ratio:

65 dB (typical) transmitted

Transmit Antenna:

Integral with microphone cord


Electret type, 3.5 mm mono phone plug

External Controls:

Momentary push button: push and hold 3 seconds for power On/Off, push and release for microphone mute On/Off; Rotary sixteen channel switch (with internal channel lock switch)

Mic Input:

3.5 mm mono phone jack with electret mic bias, internal adjustable gain with 25 dB range

Aux Input:

2.5 mm stereo phone jack, internal adjustable gain with 60 dB range

Audio Compression:

1:1 or 2:1 ratio selected with internal slide switch

Compatible Receivers:

PFM R31, PFM R32, PFM R33, PFM R36, PPA R35, PPA R35-8, PPA R1600


FCC, Industry Canada, RoHS, WEEE


5 years, parts and labor (90 days on accessories)

Other Models


TGS 863 Hearing Helper® FM tour guide system

TGS R863N FM Three-channel selectable receiver

Accessories for FM 3-channel Selectable Transmitter

BAT 001 AA Alkaline Battery

BAT 026 AA Rechargeable Battery

CHG 3512 Body-pack charger, 12 bay

MIC 020 Lightweight rear wear mic

MIC 054 Directional lapel mic

MIC 096 Headband Microphone


Download/View Name Type Language
FM Brochure - High Res Brochures English
FM Brochure - Low Res Brochures English
T863 Hearing Helper® manual Manuals English
T863 Specifications Specifications English


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