TOA IR-310M Y Lightweight Infrared Wireless Hands-free Microphone,

2 Ch. Selection, Electret Condenser, with external Mic. Input. Panic button option., Requires 1 x IR-200BT or 1 x AA. t eliminates problems with interference or eavesdropping, allowing simultaneous use in adjacent conference rooms or school classrooms. Since infrared wireless microphone systems use 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. Features: Easy-to-wear, neck-suspended design. Lightweight body. Ajustable infrared light emission at 2 levels. Two selectable channel frequencies. Antibacterial treatment. Employs an electret condenser microphone or external microphone. External MIC input level adjustment function allows for sensitivity adjustment. Color-coded ID stickers available. Specifications: General: Battery: IR-200BT-2 rechargeable battery for the infrared wireless microphone (option) or AA alkaline dry cell battery (2 pieces). Current consumption: Typ. 250mA (2.4V, power selector switch: N Typ. 340mA (2.4V, power selector switch: H). Tone signal: 32.768kHz. Modulation sensitivity: +/-4.8kHz, when SPL of 84dB is input). Maximum input sound pressure: 120dB SPL. Input sensitivity adjustment: Adjustment range: -9dB to 0dB (factory preset: 0dB). Microphone unit: Unidirectional electret condenser microphone. Frequency response: 100Hz - 12kHz