Five-year limited warranty – LightSpeed Technologies 850IR User Manual
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FRONT PANEL CONTROLS
LES 850iR Classroom Amplification System
1.
POWER Switch/POWER Indicator:
 This switch is used to turn the 
 850iR ON (switch up), or OFF 
 (switch down). When the POWER 
 switch is in the ON position, the 
 POWER light will glow red.
2. IR Indicators (IR):
These lights will
 glow red when the corresponding 
 microphone is turned on. This light 
 confirms the 850iR is receiving a 
 steady infrared signal.
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3.
AF Indicators (AF): These lights
 flash green when audio (voice) 
 from the microphone is detected.
4. A VOLUME:
Controls the volume
 level of the teacher microphone 
 that is switched to Channel A. 
 Rotating the knob clockwise 
 increases output level.
Speak
in a natural voice. A normal conversational speech level
will provide an adequate signal. It is not necessary to increase 
the intensity of your voice—the amplification system provides 
adequate amplification (approximately 5 – 10 dB) above 
ambient room noises.
LightSPEED Classroom Amplification Systems are guaranteed against malfunction due to 
defects in materials and workmanship for a period of FIVE (5) YEARS, beginning at the date 
of the purchase invoice. If such malfunction occurs, the product will be repaired or replaced 
(at LightSPEED’s option) without charge during the period and under the limitations stipulated 
in the data sheet or the user’s manual.
1. Limited exclusions specifically apply to all microphone elements, rechargeable 
 batteries, battery chargers and their assemblies, also external cables and wires.
2. Warranty on microphones/microphone elements is limited to original manufacturer’s 
 warranty (usually ONE (1) YEAR).
3. Warranty on LightSPEED NiMH AA rechargeable batteries is ONE (1) YEAR.
3. Warranty on LightMic’s internal microphone is FIVE (5) YEARS.
4. Prepaid shipping label provided by LightSPEED factory or an authorized warranty 
 service center.
5. Warranty does not extend to finish, appearance items, or malfunctions due to abuse or 
 operation other than specified conditions, nor does it extend to incidental or consequential 
 damages. Repair by other than LightSPEED or its authorized service agencies will void this 
 guarantee. Information on authorized service agencies is available from LightSPEED 
 Technologies, Inc.
TIPS ON CLASSROOM AMPLIFICATION
Avoid
wearing jewelry that may rub or bump against
the microphone.
Turn
the LightMic off during private conversations with a student,
parent, or other classroom visitor. You can also cover the LED 
lens on top of the LightMic to block the signal.
Recharge
batteries each night. When recharged nightly, operating
 time (actual usage) for the transmitters will last through a typical 
 school day.
Our Service Department (800.732.8999, 6:30 a.m. – 5 p.m.,
PST) will handle all your repair/replacement needs.
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Five-year Limited Warranty
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