Meeting Chairman Microphone Infrared Duple Unit Conference Room Microphone System 
Duplex meeting delegate microphone Infrared of OBT-6688D

Technical indicators of microphones in attendance unit
• Built-in hi-fi speakers
• Power supply: DC12V
• Power consumption: Standby ≤ 360mW, speech ≤ 630mW
• Operating temperature -10ºC -- 40ºC
• Length of the rod: 400mm
• Dimensions (W×H×D) : 170mm×5.8mm (excluding the microphone) ×120mm
• Weight: 0.6kg

Audio channel
• Communication mode: UHF wireless mode (one-way)
• Number of channels: 5 (1 chairman cell channel, 4 for cell channel)
• frequency range :(500MHz - 950MHz range is available)
• Modulation: FM
• Maximum modulation: 60K
• Radiated power: <=+9dBm
• Frequency deviation: <0.002
• Reference speech distance: 10cm--30cm

The control channel
• Communication mode: wireless (two-way)
• Number of channels: 16
• Frequency range: 422.4mhz -- 438.4mhz
• Modulation: FSK
• Receiving sensitivity: -100dbm
• Radiated power: <=+6dBm
• Frequency deviation: <0.002