Listen Tech LR-400 Portable Display RF Receiver

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Listen Tech LR-400 Portable Display RF Receiver (Discontinued)

Description

Details

The Listen Tech LR-400 Portable Display RF Receiver is a lower cost digital display receiver. It has the same exceptional audio quality and convenient recharging options as Listen's other full-featured receivers. The LR-400-072 can receive up to 17 wide band channels with 40 narrow band. The LR-400-072 has a digital display (LCD) to monitor channel selection, battery level, and signal strength. An LED on top of the receiver indicates if the unit is on, when batteries are low or if the unit is locked on a channel. It has channel SEEK capability and is compatible with mono or stereo earphones.

This product is approved by the FCC for use in the US. Please note that they cannot be used in all countries. Check with your local government or specific regulation with regard to broadcast frequency in your specific country. Note: FCC rules limit the use of this product to assistive listening.

Features

Features

Superior audio quality – 80 dB signal-to-noise ratio (SNR), setting the industry’s sound quality standard
57 channels
100 % Digital – Listen receivers are digitally-tuned so the transmission won’t drift
Limited Lifetime Warranty with hassle-free support
Look & Listen LCD shows channel, battery status, and signal strength
Uses standard alkaline or nickel-metal hydride (NiMH) batteries
Built in SmartCharge won’t allow batteries to overcharge. Charging circuitry is conveniently built into Listen’s receivers
Drop in charging contacts for any of Listen’s many charging cases or a charging plug on the side of the unit
Many accessory options make Listen products ideal for a wide range of applications

Specification

RF
RF Frequency Range	72.025 - 75.950 MHz
Number of Channels	17 wide band, 40 narrow band
Sensitivity	.6uV typical, 1 uV maximum for 12 dB sinad
Frequency Accuracy	± .005% stability 32 to 122 ºF (0 to 50 ºC)
Antenna	Uses earphone cable
Squelch	Programmable in 20 steps, automatic on loss of RF signal
Compliance	FCC Part 15, Part 90, Industry Canada, RoHS
Audio
System Frequency Response	50 Hz - 15 kHz (±3 dB)
System Signal to Noise Ratio	SQ enabled 80 dB, SQ disabled 60 dB
System Distortion	<2% total harmonic distortion (THD) at 80% deviation
Output	0.14" (3.5 mm) connectors, unbalanced, 0 dBu nominal output level,16 mW maximum, impedance 32 ohm
Controls
User Controls	Channel up/down, SEEK, volume
Set-up Controls (Battery Compartment)	Alkaline/NiMH batteries, SQ enable/disable
Programming	Channel lock, squelch
Indicators
LED	Red, illuminated when unit is on, flashes when batteries are low or to indicate charging
LED	Flashes when locked and SEEK is pushed
Display	Channel designation, battery level, battery charging, RF signal strength and channel lock
Battery Type	Two (2) AA batteries, alkaline or NiMH
Battery Life (Listen Batteries)	30 hours alkaline (LA-361), 15 hours NiMH rechargeable (LA-362)
Battery Charging (NiMH only)	Fully automatic, 13 hours
Power
Power Supply	I/P 120 VAC; O/P 7.5 VDC 250 mA, drop in contact points for use with charging cases
Power Supply Connector	0.09" (2.3 mm) OD by 0.7 mm ID, barrel type connector 7.5 VDC
Power Supply Connector	center positive <250 mA, drop in contact points for use with Listen charging cases
Power Supply Compliance	RoHS, WEEE, UL, PSE, CE, CUL, TUV, CB
Environmental
Temperature - Operation	14 to 104 ºF (-10 to 40 ºC)
Temperature - Storage	(-)4 to 122 °F (-20 to 50 °C)
Humidity	0 to 95% relative humidity, non-condensing
Physical
Color	Dark Grey with white silk screening
Door	Manually lockable, SEEK/channel select behind the door
Dimensions (H x W x D)	4.25" (108 mm) x 2.75" (70 mm) x 1.50" (38 mm)
Weight	0.24 lbs (111 g)
Weight with Batteries	0.36 lbs (164 g)
Shipping Weight	0.38 lbs (173 g)

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