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Offering high-performance audio and convenient recharging features in an affordable package, the LR-400-863 Portable Display RF Receiver is a popular choice for establishing or expanding an assistive listening system. Capable of receiving up to 17 wide-band or 40 narrow-band channels, the LR-400-863 features a digital LCD display, channel seeking capabilities, and compatibility with mono or stereo headphones. The LCD display provides each user with channel selection, battery level, and signal strength information, and an LED on the top of each receiver indicates power status and low battery conditions.

The LR-400-863 Portable Display RF Receiver is designated for use in Europe.


One (1) LR-400-863 Portable Display RF Receiver

One (1) Quick Reference Card


  • Cost-effective receiver choice for starting or expanding RF assistive listening systems
  • Can receive up to 17 wide-band or 40 narrow-band channels Easy-to-read LCD display with battery status, channel information, and signal strength readings
  • Channel seek capabilities 70 dB signal-to-noise ratio for industry-leading sound quality
  • Built-in SmartCharge feature prevents overcharging
  • Simple drop-in charging compatible with Listen Technologies’ charging cases and plugs
  • Compatible with mono and stereo headphones
  • Limited lifetime warranty and hassle free support from Listen Technologies
Configurations & Architectural Specs


LR-400-863 Portable Display RF Receiver (863 MHz)

Architectural Specs

The RF receiver shall be capable of receiving on 17 wide band channels with a SNR of 70 dB or greater. The device shall be able to be locked on a single channel. The receiver shall be capable of seeking channels. The unit shall incorporate a multi-functional LED that indicates power, channel lock, low battery, and battery charging. The device shall have a programmable squelch. The device shall have an audio frequency response of 50 Hz to 15 kHz (‘±3 dB). The device shall incorporate a stereo earphone jack that allows the user to plug in either a mono or stereo earphone(s). The device shall incorporate an LCD display that indicates channel, battery level, low battery, battery charging, RF signal strength and channel lock status. The receiver shall be able to function in both DX and Local mode. The unit shall operate off of two (2) AA batteries; alkaline or NiMH. The receiver shall incorporate automatic battery charging circuitry for recharging of NiMH batteries. The device shall have a switchable option for the use of alkaline or NiMH batteries. The Listen LR-400-863 is specified.

Product Specifications


Frequency Response50 Hz - 15 kHz (±3 dB)
Signal-to-Noise Ratio70 dB (A-Weighted)
Audio Output Jacks3.5 mm (0.14 in.) connectors, unbalanced, 0 dBu nominal output level, 16 mW maximum, impedance 32 ohm
Distortion< 2% total harmonic distortion (THD) at 80% deviation


User ControlsChannel up/down, SEEK, volume, Alkaline/NiMH battery switch
ProgrammingChannel lock, DX/Local, squelch


LCDChannel designation, battery level, battery charging, RF signal strength and channel lock
LEDsRed, illuminated when unit is on, flashes when batteries are low or to indicate charging, flashes when locked and SEEK is pushed


Frequency Range863.050 - 864.950 MHz
Number of Channels17 Wideband
Sensitivity.6uV typical, 1 uV maximum for 12 dB sinad
Frequency Accuracy± .005% stability 32 to 122 ºF (0 to 50 ºC)
SquelchProgrammable in 20 steps, automatic on loss of RF signal
Antenna TypeIntegrated external antenna


Battery TypeTwo (2) AA batteries, alkaline or NiMH
Battery Life20 hours alkaline (LA-361), 10 hours NiMH rechargeable (LA-362)
Battery Charging TimeFully Automatic, 13 hours maximum


Width7.0 cm (2.75 in.)
Height10. 8 cm (4.25 in.)
Depth3.8 cm (1.50 in.)
ColorDark Grey with white silk screening
Unit Weight with Batteries164 g (5.8 oz)
Shipping Weight173 g (6.1 oz)
Weight111 g (3.9 oz)
DoorManually lockable, SEEK/channel select behind the door


Temperature - Operation14 to 104 ºF (-10 to 40 ºC)
Temperature - Storage-4 to 122 °F (-20 to 50 °C)
Relative Humidity0 to 95% relative humidity, non-condensing


SafetyCE, ETSI, RoHS
Used With
QWhat is the difference between the LR-400 and the LR-500?
AThe LR-500 gives the user an opportunity to lockout unused channels and has the controls on the outside of the front door.
QCan the LR-400 be used with multiple transmitters?
AYes. The LR-400 can be used with multiple transmitters, but unlike the LR-500, it cannot be programmed to lock out channels.
QWhat is squelching?
AThe purpose of squelch is to mute the audio output of your receiver when the signal from the transmitter is turned off or is too weak to be received. Without squelch you would hear radio noise in your earphone. The squelch function is preset and cannot be changed on the LR-300.
QHow many receivers can I have in a system?
AAs many as you need, the number is endless.
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