TeachLogic IRT-55
Sapphire Transmitter/Mic


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The Sapphire is TeachLogic's stylish new lightweight IR transmitter/microphone. It's so small, that it's hardly noticable to wear. it can be worn with a lanyard or clipped directly to your neckline collar.


The Sapphire's vocal clarity is unsurpassed. Its high level output is achieved by the unidirectional (Cardioid) microphone and a unique free air suspension. With a built-in breath filter, the Sapphire can function as a pass-around hand mic.


The strategic alignment of the emitting diodes assures reliable connectivity throughout the room without static or drop out.


With a tap on the power button, the Sapphire mutes the microphone for private conversation - tap again to restore to norman operation. The auxiliary input allows wireless playback of your iPod through the Sapphire. A three position slide switch provides selection of low, med or high microphone volume level.


  • Elegant design
  • Only 1.4oz including battery
  • Long life "Lithium Ion" battery
  • Rechargeable via USB cable to computer
  • Battery level indicator - back light under power switch
  • Momentary mute button, back light blinks in mute mode
  • Push "on/off" power
  • Channel "A" or "B" selectable
  • Volume control
  • Three level microphone volume switch (low, medium, high)
  • Auxiliary input (1/8" TRS)
  • Low profile clip for mounting
  • Wear with a lanyard or directly to neckline collar



  • Transmitter Carrier: Infrared
  • Transmission Frequencies: 2.08MHz and 2.54MHz
  • Channel Switchable A or B: Field Switchable
  • Transmitting Diodes: Six
  • Modulation: FM Wide-Band
  • Pilot Tone Frequency: 32.768kHz
  • Peak Deviation: +/-25kHz
  • Operating Range: 1,500 ft/sq // 60' line of sight
  • Battery Discharge Indicator: Blue = Full, Purple = Medium, Red = Low, Flashing Red = Very Low
  • Battery Type: Lithium-Ion (3.7V / 620mAh)
  • Battery Life: Approx. 8-9 Hrs/Charge
  • External Power Charger: DC +5V, Micro USB connector
  • Transmission Angle: 180 degrees conical
  • User Controls: Power Switch - Push On/Off // Mute Switch - Push On/Off // Mic Switch - 3-position (+6dB, Normal, -6dB) // Aux. Vol./Gain - Increase/Decrease // Channel Select - (A or B) in battery compartment
  • External Aux Input: 1/8" Stereo line level
  • Dimensions (HxWxD): 3" x 1.25" x 0.75"
  • Weight: 1.4oz including battery
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