One-to-Two Wireless Conference Microphone (Short Rod) UK-Ai220D

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 for each channel with 31-level volume control. Signals are transmitted over the UHF band with a 250KHz frequency step, and frequency matching is implemented via infrared.

3. Equipped with screen lock function operated via function keys. Audio and data adopt dedicated pilot signals and ID codes to effectively prevent crosstalk and interference.

4. Supports one-touch frequency scanning to intelligently search for interference-free frequencies. Each channel features antenna diversity function that automatically indicates current antenna status for enhanced anti-interference capability.

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

6. Two rubber receiving antennas are mounted on the rear 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 various external devices.

▲8. Built-in AI voice control: supports control of 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 short gooseneck desktop microphones and external omnidirectional microphones, anti-false wake-up trigger, and 1 monitoring output.

▲10. Comes 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 and video switching control, 1 set of voice feedback monitoring and 1 line input. Wake word example: Conference Assistant. Feedback prompt: I'm listening, please speak. Turn up volume: volume increases by 1dB per step.

▲11. Supports one-touch AI voice control to turn off all devices with sequential protection mechanism: the conference system shuts down first, the display screen powers off after 5 seconds, and lighting turns off after 10 seconds to avoid surge damage to switches.

▲12. Built-in 3W cavity speaker, supporting voice-controlled power on and off.

13. Simultaneously displays frequency and channel. Both receiver and transmitter show battery status. Low battery reminder is available, and audio mutes automatically when power runs out to avoid noise caused by power failure during operation.

14. Microphone power consumption: 80mA, powered by two 1.5V batteries, supporting continuous operation for over 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 (2 × 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

Polar Pattern: Unidirectional

Frequency Response: 40Hz～20KHz

Microphone Sensitivity: -43±3dB@1KHz

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