The LES-BTS Series Translation System is ideal for applications requiring mobility and quick set up. It includes:

• 1 TK-250 headset microphone
• 1 LES-370T transmitter

And your choice of:

• 3, 7 or 17 LES-370R receivers with KOSS TM602 headphones (battery and charger included)

Click here to see how it works.

Optional Accessories

TR-1, TR-2, TR-8 receiver sets
The belt pack receiver sets give you the ability to add listeners to LightSPEED’s three translation systems. Receivers are available in 4 dual-frequency groups to accommodate the need for multiple language translation in the same room. (The receiver’s frequency must match the transmitter frequency being used.) Three receiver sets are available:

TR-1: One LES-370R receiver w/KOSS TM602 headphones
TR-2: Two LES-370R receivers w/KOSS TM602 headphones
TR-8: Eight LES-370R receivers w/KOSS TM602 headphones
(battery and charger included)


Optional cradle chargers
The LES-3CC Series Charging Stations charge up to 18 LES-370T/370Rs
from a single wall outlet.

Product Specifications

RX-370R Beltpack Receiver Specifications

• RF Output Power 50 mW
• Spurious Response 32 dB below carrier
• Microphone Input Impedance 1 k Ohms
• Run Time Capacity 6 hours
• Microphone Level Audio Adjust (Variable) 0 to –12 dB
• Weight (w/1 AA battery) 2.8 oz.
• Dimensions 2 x 3 x 0.8 (W x H x D inches)

TX-370T Beltpack Transmitter Specifications

• Frequency Response 100 Hz–12 kHz
• Sensitivity –70 dB ±4 dB (0 dB = 1V/µbar, 1 kHz)
• Connector Type 3.5 mm Mini-plug
• Element Unidirectional, Noise-canceling
• Weight 1.7 oz.

MC-TK250 Headset Microphone Specifications

• Audio Output Level
• (TM-602 Koss Headphones) 98 dB SPL (Max)
• (MDR-S Sony Ultralight Headphones) 114 dB SPL (Max)
• Sensitivity 3 µV (at 40 dB S/N)
• Image and Spurious Rejection 40 dB
• Power Supply 1.5 V (AA) NiMH battery
• Run Time Capacity w/Full Charge 20 Hours

HP-TM602 Koss Headphone Specifications (standard w/LES 370 system)

• Weight 2.5 oz.
• Frequency Response 100 Hz–16 kHz
• Impedance 32 Ohms
• Sensitivity 88 dB SPL/1 mW
• Cord Length 4 ft.

Frequency Information



*NOTE: A maximum of 7 channels can be used simultaneously.
Channels 1, 3, 4, 8, 11 and 13 are compatible along with 15 or
16, but not both.

The TX-370T and RX-370R carry a 1-year limited warranty. Extended service contracts are available for an additional fee.