The IR-300M is a hands-free infrared wireless microphone. It eliminates problems with interference or eavesdropping, allowing simultaneous use in adjacent conference rooms or school classrooms. Since infrared wireless microphone system uses a frequency band that does not interfere with that of the TS-800 and TS-900 series infrared conference system, both systems can be simultaneously installed in the same location.

Specifications:

• Battery: IR-200BT-2 rechargeable battery for the infrared wireless microphone (option) or AA alkaline dry cell battery (2 pieces).
• Current Consumption: Typ. 250 mA (2.4 V, Power selector switch: N), Typ. 340 mA (2.4 V, Power selector switch: H)

Infrared Emitter:

• Wavelength: 870 nm (AM: Brightness modulation)
• Modulation Method: Frequency modulation
• Carrier Frequency: Channel A: 3.100 MHz, Channel B: 3.350 MHz
• Transmission Distance: Approx. 20 m (65 ft) (Power selector switch: H, in an unobstructed space), Approx. 15 m (50 ft) (Power selector switch: N, in an unobstructed space)
• Tone Signal: 32.768 kHz
• Modulation Sensitivity: ±4.8 kHz (1 kHz, when SPL of 84 dB is input)
• Maximum Input Sound Pressure: 120 dB SPL
• Input Sensitivity Adjustment: Adjustment range: -9 dB to 0 dB (factory preset: 0 dB)
• Microphone Unit: Unidirectional electret condenser microphone
• Frequency Response: 100 Hz - 12 kHz
• Preemphasis: 300μs
• Input: External microphone input (φ3.5 monaural mini jack)
• Battery Operation Time: Approx. 8 h (when the IR-200BT rechargeable battery for the infrared wireless
• microphone is used, Power selector switch: N), Approx. 6 h (when the alkaline battery is used, Power selector switch: N)
• Operating Temperature: 0 °C to +40 °C (32 °F to 104 °F)
• Operating Humidity: 30 % to 85 %RH
• Finish: Control section: ABS resin, metallic gray, paint, 50% gloss, Filter section: Polycarbonate, optical cut filter
• Dimensions: 64 (W) x 91.3 (H) x 27.3 (D) mm (2.52" x 3.59" x 1.07")
• Weight: 130 g (0.29 lb) (with battery and strap)
• Accessory: Screw driver (for setting) ...1, Color label (6 colors) ...1