Specification	LR-400-072	LR-400-216
RF	RF Frequency Range	72.025 - 75.950 MHz	216.0125 - 216.9875 MHz
	Number of Channels	17 wide band, 40 narrow band	19 wide band, 38 narrow band
	Sensitivity	.6uV typical, 1 uV maximum for 12 dB sinad
	Frequency Accuracy	� .005% stability 32 to 122� (0 to 50�C)
	Antenna	Uses earphone cable
	Squelch	Programmable in 20 steps, automatic on loss of RF signal
	Compliance	FCC Part 15, Industry Canada	FCC Part 90, Industry Canada
Audio	** All system specifications are wireless end to end**
	System Frequency Response	50 Hz - 15 kHz (�3dB) 72 MHz	50 - 10 kHz (�3dB) 216 MHz
	System Signal to Noise Ratio	SQ enabled: 80dB; SQ disabled 60dB
	System Distortion	<2% total harmonic distortion (THD) at 80% deviation
	Output	3.5mm connectors, unbalanced, 0dBu nominal output level, 16mW maximum, impedance 32 Ohms
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. Flashes when locked and SEEK is pushed.
	Display	Channel Designation, lock status, signal strength indication
Power	Battery Type	Two 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 Supply	I/P 120VAC; O/P 7.5VDC 250 mA; Drop in contact points for use with charging cases. Power supply not included (LA-202)
	Power Supply Connector	2.3mm OD by 0.7mm ID, barrel type connector 7.5 VDC, center positive <250mA. Drop in contact points for use with Listen charging cases
	Power Supply Compliance	RoHS, WEEE, UL, PSE, CE, CUL, TUV, CB compliant
Physical	Dimensions (H x W x D)	3.00 x 1.00 x 5.00 in. (7.6 x 2.5 x 13.0 cm)
	Color	Dark Grey with white silk screening
	Unit Weight	3.9 oz (111g)
	Unit Weight with batteries	5.8 oz (164g)
	Shipping Weight	1.0 lbs. (0.45kg)
	Door	Manually lockable. SEEK behind the door.
Environmental	Temperature - Operation	14 to 104� F (-10 to 40� C)
	Temperature - Storage	-4 to 122� F (-20 to 50� C)
	Humidity	0 to 95% relative humidity, non-condensing
Specifications are subject to change without notification

FAQs

Q. What is the difference between the LR-400 and the LR-500?
A. The LR-500 gives the user an opportunity to lockout unused channels.

Q. Can the LR-400 be used with multiple transmitters?
A. Yes. We recommend the LR-400 for use with multiple transmitters. The LR-400 is programmable and can be set to just those channels you need.

Q. How many receivers can I have in a system?
A. As many as you need, the number is endless.

Q. What is the function of SQ?
A. To reduce noise of our systems, Listen now offers a noise reduction technology called ListenSQ� (on 72 MHz and 216 MHZ only). Both the transmitter and receiver must have SQ on to achieve the desired results. If you are planning to use this product with older Listen systems or equipment not manufactured by Listen, you should disable SQ.

Q. What is the warranty of Listen receivers?
A. Limited lifetime warranty. The following cases will void the warranty:
� Misuse, dropping, or any other noticeable cosmetic damage
� Charging alkaline batteries instead of NiMH
� Overheating the charging process by closing the lid on the charging case

Q. How long do the batteries last on the LR-400 receiver?
A. Alkaline batteries last 30 hours. NiMH rechargeable batteries last 15 hours (72 MHz and 216 MHz). With 863 MHz, Alkaline batteries last 20 hours and NiMH rechargeable batteries last 10 hours.

LR-400 Datasheet
Portable FM Brochure

� LR-400 Portable Display FM Receiver
� Owner�s manual (72 MHz & 216 MHz)

Please Note: Does not include batteries or earphone/headphone

�Superior Audio Quality � 80 dB (70 dB with 863 MHz) signal-to-noise ratio, setting the industry�s sound quality standard.
�A choice between 57 channels (17 channels with 863 MHz), complete antenna and accessory options make Listen products ideal for a wide range of applications.
�100 % Digital � Listen receivers are digitally-tuned so transmission won�t drift; assurance that when you select a channel, it stays on the channel.
�Uses standard alkaline or NiMH batteries.
�Built in SmartCharge� won�t allow batteries to overcharge. Charging circuitry is conveniently built into Listen�s receivers; never worry about unplugging a transformer at a certain time.
�Transformer charging plug or for the ultimate in convenience drop in charging contacts.
�Limited Lifetime Warranty with hassle-free support.

1. An earphone jack (3.5 mm) that accepts either mono or stereo headsets. Receiver antenna is built into the earphone cord, eliminating additional wires while maximizing receiver effectiveness.
2. Multifunction LED indicates power on, if batteries are low, if the unit is locked on a channel when SEEK is pressed and charging status.
3. Easy on/off volume control.
4. Look&Listen� LCD Display shows channel selection, channel lock and battery level.
5. Seeks to find best available broadcast. Also used to adjustable squelch in 20 steps mutes audio on loss of RF signal.
6. Uses two AA batteries. Selectable to use either alkaline or Listen�s advanced NiMH Rechargeable AA Batteries. SmartCharge� incorporated into receiver makes sure each unit receives the most beneficial charge.
7. When enabled, SQ provides highest audio quality available in its product category. SQ can be disabled for compatibility with other assistive listening equipment.
8. Digitally tuned with UP, DOWN, and SEEK buttons behind manually lockable door. Electronically lock on channel by holding the SEEK button down 5 seconds to prevent tampering.
9. Manually lockable battery compartment door.
10. Charging plug port.
11. Contact points for Listen's drop in charging cases.
12. Exclusive belt clip �loop� prevents unit from slipping off belt or strap.