Two-Channel Wireless Handheld Microphone UK-Ai220

Product Features:

1. Adopts UHF ultra-high frequency band, featuring less interference and more reliable transmission compared with the traditional VHF band. 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 regulation. Signals are transmitted over the UHF band at 250 KHz frequency steps, and frequency matching is realized via infrared.

3. Equipped with a lock screen function operated by function group 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 the current antenna status for enhanced anti-interference performance.

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

6. Two rubber receiving antennas are mounted on the rear of the receiver to boost 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 the doorway conference status indicator panel, with voice audio feedback.

▲9. Supports voice control via two handheld microphones and external omnidirectional microphones, anti-false-trigger wakeup, and 1 monitoring output.

▲10. Comes with 1 power sequencer control port, 1 lighting control port, 1 conference indicator panel 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. When instructed to increase volume, the volume rises in 1 dB steps.

▲11. Supports one-touch AI voice command to turn off all devices with an application sequence protection mechanism: the conference system is shut down first, the display screen is turned off after 5 seconds, and the lights are switched off after 10 seconds to avoid switch damage caused by impact current.

▲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 show battery status. Low battery reminder is triggered when power is insufficient, and audio is muted upon power exhaustion to avoid noise during use.

14. Microphone power consumption: 80 mA, 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 640-690 MHz (UHF 624.2 MHz-673.95 MHz; CH1: 624.2–648.95 MHz, CH2: 649.2–673.95 MHz)

Frequency Stability: ±0.001%

Modulation Mode: FM

Signal-to-Noise Ratio: >105 dB

Distortion: <0.5% @1 KHz

Frequency Response: 65 Hz～18 KHz ± 3 dB

Sensitivity: 1.2 μV @S/N=5 dBμV

Power Supply: DC 12V～17V

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

Transmitter Specifications

Power Supply: DC 3V (2 × 1.5V AA batteries)

Microphone Current Consumption: 100 mA

Carrier Frequency: UHF 640-690 MHz

Frequency Stability: ±0.001%

Maximum Frequency Deviation: ±30 KHz

Signal-to-Noise Ratio: >60 dB

Adjacent Channel Rejection Ratio: >80 dB

Dynamic Range: ≥100 dB

Type: Condenser Microphone

Polar Pattern: Unidirectional

Frequency Response: 40 Hz～20 KHz

Microphone Sensitivity: -43±3 dB @1 KHz

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