Listen Technologies Simultaneous Interpretation Receiver LR-300 Specs

The FM receiver shall be capable of receiving on 17 wide band channels and have a SNR of 80dB or greater.

The receiver shall be capable of seeking channels.
The device shall have a squelch.
The device shall have an audio frequency response of 50Hz to 15KHz, +/- 3dB at 72MHz

The device shall incorporate a stereo headset jack that allows the user to plug in either a mono or stereo headset and listen to audio normally.

The receiver shall incorporate automatic battery charging circuitry for recharging of NiMH batteries. The Listen LR-300 is specified.

The LR-300 carries a 90-Day Performance Guarantee and the Listen Limited Lifetime Warranty.

	Specification	LR-300 Specifications
RF	RF Frequency Range	72.025 - 75.950 MHz
	Number of Channels	17
	Sensitivity	.6uV typical, 1 uV maximum for 12dB SINAD
	Frequency Accuracy	± .005% stability 0° to 50°C (32° to 122° F)
	Antenna	Uses earphone cable
	Antenna Connector	3.5mm connector
	Squelch	Automatic on loss of RF signal
	Compliance	FCC Part 15, Industry Canada

Audio	** All system specifications are wireless end-to-end
	System Frequency Response	63Hz - 15kHz (±3dB)
	System Signal to Noise Ratio (A-weighted)	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	Set Up Controls	Alkaline/NiMH batteries and SQ enable/disable
	User Controls	Volume and SEEK. (SEEK is electronically lockable, and are behind the door).
	Programming	Channel selection can be locked by holding the SEEK button for 5 seconds

Indicators	LED	Red, illuminates when unit is on. Flashes when batteries are low. Flashes when charging. Flashes when locked and user attempts to seek to another channel.

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, 14 hours
	Power Supply Connector	2.3mm OD by 0.7mm ID, barrel type connector. 7.5VDC, center positive <250mA. Drop in contact points for use with Listen charging cases.
	Compliance	UL Listed

Physical	Dimensions	3.0 in x 1.0 in x 5 in WxDxH (7.6cm x 2.5cm x 13.cm)
	Unit Weight	3.9oz (111g)
	Unit Weight with batteries	5.8 oz (164.4g)
	Shipping Weight	1.0 lbs (453.6kg)
	Door	Manually lockable. SEEK behind the door (see Controls above).

Environmental	Temperature - Operation	-10° to 40°C (14° to 104° F)
	Temperature - Storage	-20° to 50°C (-4° to 122° F)
	Humidity	0 to 95% relative humidity, non-condensing

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