Two-in-one Wireless Conference Microphone (Long Pole) UK-Ai220C

Product Features:

1. Adopts UHF ultra-high frequency band, featuring less interference and more reliable transmission compared with traditional VHF bands. It supports two-channel signal reception with 100 selectable channels per channel and IR infrared automatic frequency matching function, suitable for various conferences and speech scenarios.

2. Independent electronic volume adjustment is available for each channel with 31-level volume control. Signals are transmitted over the UHF band with 250KHz frequency stepping, and frequency matching is realized via infrared technology.

3. Equipped with a lock screen function operated by function group keys. Dedicated pilot signals and ID codes are adopted for audio and data transmission to effectively avoid crosstalk and interference.

4. Supports one-touch frequency scanning to intelligently search for interference-free frequencies. Each channel is provided with antenna diversity function which can automatically indicate the current antenna status for stronger anti-interference capability.

5. Signals are transmitted over the UHF band within the frequency range of 640-690MHz. The LCD screen displays working channel, operating frequency point, received signal and audio signal.

6. Two rubber receiving antennas are mounted on the rear panel of the receiver to strengthen signal reception with an elegant appearance.

▲7. The rear panel is equipped with 2 balanced outputs, 1 mixed unbalanced output and 1 mixed balanced output, compatible with connection to various external devices.

▲8. Built-in AI voice control: supports control over power supply, lighting, LED screen power, video switching and volume, as well as conference status indicator at doorway, with voice audio feedback.

▲9. Supports voice control via gooseneck desktop microphones and external omnidirectional microphones, anti-false wake-up trigger, and 1-channel monitoring output.

▲10. Equipped with 1 power sequencer control port, 1 lighting control port, 1 conference indicator control port, 1 LED screen control port, 2 RS-232 ports for volume control and video switching, one set of voice feedback monitoring, and 1 line input. Example wake word: Conference Assistant. Feedback prompt: I'm listening, please speak. Turn up volume: the volume increases by 1dB per step.

▲11. Supports one-touch AI voice command to turn off all devices with sequential protection mechanism: the conference system is shut down first, the display screen is turned off after 5 seconds, and lighting is switched off after 10 seconds to prevent surge damage to switches.

▲12. Built-in 3W cavity speaker, which can be turned on and off via voice control.

13. Synchronous display of frequency and channel. Both receiver and transmitter display battery status. Low battery reminder is available; audio will be muted when power runs out to effectively eliminate noise caused by power failure during use.

14. Microphone power consumption: 80mA, powered by two 1.5V batteries, supporting continuous operation for more than 6 hours.

15. Operating distance: 60 meters

Receiver Specifications

Oscillation Mode: Phase-Locked Loop Frequency Synthesis

Frequency Range: UHF 640-690MHz (UHF 624.2MHz-673.95MHz; CH1: 624.2-648.95MHz, CH2: 649.2-673.95MHz)

Frequency Stability: ±0.001%

Modulation Mode: FM

Signal-to-Noise Ratio: >105dB

Distortion: <0.5% @1KHz

Frequency Response: 65Hz～18KHz ± 3dB

Sensitivity: 1.2μV @S/N=5dBμV

Power Supply: DC 12V～17V

Audio Output: Independent: 0～400mV; Mixed: 0～300mV

Transmitter Specifications

Power Supply: DC 3V (two 1.5V AA batteries)

Microphone Power Consumption: 100mA

Carrier Frequency: UHF 640-690MHz

Frequency Stability: ±0.001%

Maximum Frequency Deviation: ±30KHz

Signal-to-Noise Ratio: >60dB

Adjacent Channel Rejection Ratio: >80dB

Dynamic Range: ≥100dB

Type: Condenser Microphone

Polar Pattern: Unidirectional

Frequency Response: 40Hz～20KHz

Microphone Sensitivity: -43±3dB@1KHz

Transmission Power: 8mW(LO)/13mW(HI)