IR-300M
The IR-300M is a hands-free infrared wireless microphone. It eliminates problems with interference or eavesdropping, allowing for simultaneous use in adjacent conference rooms or school classrooms. The 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, allowing both systems to be simultaneously installed in the same location.
Failure to follow this instruction may result in battery leakage or excessive heat generation.
Battery (*1) | Rechargeable battery for the infrared wireless microphone (option) or AA alkaline dry cell battery (2 pieces). |
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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) |
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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 |
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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 | 300 μs |
Input | External microphone input (φ3.5 monaural mini jack) |
Battery Operation Time | Approx. 8 h (when the 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 ℃ to +40 ℃ (32 ゜F to 104 ゜F) |
Operating Humidity | 30 % to 85 %RH (no condensation) |
Finish | Control section: ABS resin, metallic gray, paint, 50% gloss Filter section: Polycarbonate, optical cut filter |
Dimensions | 64 (W) × 91.3 (H) ×27.3 (D) mm (2.52" × 3.59" × 1.07") |
Weight | 130 g (0.29 lb) (with battery and strap) |
Accessory | Screw driver (for setting) …1, Color label (6 colors) …1 |
Option | Battery charger: IR-200BC Ni-MH Battery: IR-200BT-2 (containing 2 pieces) / IR-210BT-2 (containing 2 pieces) |