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Listen Technologies LT-700 Portable Transmitter
SKU: 25
List Price: $493.00
Our Price: $439.00
Your Savings: $54.00
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The Listen LT-700 Portable Display RF Transmitter is used to wirelessly broadcast audio for a variety of portable applications. Whether its voice or music, you can broadcast your audio to everyone in the audience without having to carry a microphone or be plugged into a wall. The LT-700 is excellent for factory tours, outdoor events, wireless microphone applications, classrooms, training, or personal use – anywhere you need to amplify sound, but don’t have (or want) an installed system. With the many features of the LT-700, portable transmission has never been easier for users!

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.



  • Superior Audio Quality – 80 dB signal-to-noise ratio, setting the industry’s sound quality standard

  • A choice between 57 channels, complete antenna and accessory options make Listen products ideal for a wide range of applications

  • Look & Listen™ LCD shows channel, battery status, and programming information

  • 100 % Digital – Listen receivers are digitally-tuned so transmission won’t drift; assurance that when you select a channel, it stays on the channel

  • Transmit up to six (6) channels simultaneously on 72 MHz

  • Uses standard alkaline or NiMH batteries

  • Transformer charging plug or drop in charging contacts

  • Built in SmartCharge™ won’t allow batteries to overcharge. Charging circuitry is conveniently built into Listen’s LT-700 Transmitter; never worry about unplugging a transformer at a certain time

  • Mute switch

  • Mic and/or line level inputs

  • Limited Lifetime Warranty with hassle-free support




Frequency Response

50 – 15 kHz (±3 dB)

Signal to Noise Ratio

SQ enabled 80 dB, SQ disabled 60 dB



<2% total harmonic distortion (THD) at 80% deviation

Microphone Input

Unbalanced, tip of 3.5 mm connector, -45 dBu nominal input level, -30 dBu maximum, impedance 20k ohms

Microphone Sensitivity

Three position switch: high, middle, and low; 6 dB increments

Microphone Power

5 VDC Bias

Line Input

Unbalanced, ring of 3.5 mm connector, -10 dBu nominal input level, -3 dBu maximum, impedance 10k ohms


User Controls

Power, mute, channel UP/DOWN, Mic sensitivity, NiMH/alkaline battery, SQ enable/disable


Channel lock out, channel lock



Channel designation, lock status, signal strength indication, battery life, RF Power


Red, illuminated when unit is on. Flashes when batteries are low, or to indicate charging. Flashes when muted



Frequency Range

72.025 – 75.950 MHz

No. of Channels

17 wide band, 40 narrow band     

Frequency Accuracy

± .005% stability 32° to 122° (0° - 50° C)

Antenna Type

Microphone cable

Transmitter Stability

50 PPM

Transmission Range

From 0 to 150 ft. (45.7 mm)

Antenna Connector

3.5 mm connector

Output Power

Less than 10 mW

No. of Simultaneous Transmitters



Power Supply

I/P 120 VAC; O/P 7.5 VDC 250 mA; Drop in contact points for use with charging cases. Power supply not included (LA-208)

Power Supply Connector

2.33 mm OD by 0.7 mm ID, barrel type connector 7.5 VDC, center positive <250 mA. Drop in contact points for use with Listen charging cases

Battery Type

Two (2) AA batteries, alkaline or NiMH

Battery Life

15 hours alkaline (LA-361), 15 hours NiMH rechargeable (LA-362)

Battery Charging Time

Fully automatic, 13 hours


RoHS, WEEE, UL, PSE, CE, CUL, TUV, CB compliant


Dimensions (H x W x D)

5.00 in. (13.0 cm) x 3.00 in. (7.6 cm) x 1.00 in. (2.5 cm)


Dark Grey w/ white silk screening

Unit Weight w/ Batteries

5.8 oz. (164 g)

Shipping Weight

1.0 lb.s (0.5 kg)


3.9 oz. (111 g)


Manually lockable, controls accessible through doors


Temperature – Operation

14° (-10° C) to 104° (40° C)

Temperature – Storage

-4° (-20° C) to 122° (50° C)

Relative Humidity

0 to 95% relative humidity, non-condensing



FCC Part 15, Industry Canada


Related Products

Listen Technologies LA-321 8 Unit Charging/Carrying Case
SKU: 17
Listen Technologies LA-321 8 Unit Charging/Carrying Case
The LA-321 8-unit drop-in charging case is designed to store and charge up to 8 portable Listen FM products (LT-700, LR-300, LR-400 or LR-500)

Manufacturer: Listen Technologies


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