SM-U2AI AI Voice-Activated Wireless Microphone

SM-U2AI AI Voice-Activated Wireless Microphone

Professional-grade audio quality and stable transmission: New audio circuit architecture delivers refined highs, powerful mid-to-low frequencies, and maximum detail reproduction. Superior dynamic tracking enables effortless close-range pickup and extended range performance. UHF band + Phase-Locked Loop (PLL) frequency synthesis, 100×2 channels (250KHz spacing), superheterodyne double conversion design paired with multi-stage dielectric filters, surface acoustic wave (SAW) filters, and triple-stage ceramic filters deliver outstanding interference resistance. 100-meter ideal operating radius adapts to diverse scenarios.

Precision Control + Smart Convenience: The receiver features an LCD display showing real-time core information including dual-channel frequencies, RF signal strength, and level status. Electronic volume buttons enable precise level matching, while infrared auto-tuning rapidly synchronizes microphones to the channel. The transmitter supports high/low power switching, balancing transmission distance and battery life for greater flexibility.

Versatile Connectivity + Practical Design: The receiver includes ≥3 RS-232 ports, ≥1 USB port, balanced/unbalanced audio outputs, and BNC connectors for extensive expandability. Supports self-illuminating logo and power button indicators for real-time status display. A specially designed mute circuit eliminates switch impact noise. The microphone uses readily available AA batteries (6-10 hour runtime), with a unique boost circuit ensuring performance remains unaffected by low battery levels—practical and worry-free.

 

Category:

Product Features:

1. Microphone receiver interfaces: ≥3 RS-232 ports, ≥1 USB port, ≥1 firmware upgrade switch, ≥2 balanced audio outputs, ≥1 unbalanced audio output, ≥2 BNC connectors;

2. Receiver supports self-illuminating logo and switch buttons, displaying real-time power status;

3. Receiver features electronic volume control for precise signal level matching between devices;

4. Receiver displays dual-channel frequency status, channel information, RF signal strength, and real-time signal level via LCD screen;

5. Transmitter includes high/low power switch: high power extends transmission range while low power conserves battery life for environmental efficiency. Select based on operational needs;

6. New audio circuit architecture delivers refined highs, powerful mids and lows, with exceptional detail reproduction. Superior dynamic tracking ensures effortless pickup at both close and distant ranges;

7. UHF band operation with phase-locked loop (PLL) frequency synthesis. 100 × 2 channels spaced at 250 kHz intervals. Superheterodyne double-conversion design delivers exceptional reception sensitivity;

8. RF section employs multi-stage high-performance dielectric filters for superior interference resistance;

9. First IF utilizes surface acoustic wave (SAW) filters, second IF employs three-stage ceramic filters, significantly enhancing anti-interference capability;

10. Specially designed mute circuit completely eliminates impact noise during microphone activation/deactivation;

11. Microphone utilizes readily available AA batteries, delivering 6–10 hours of continuous operation;

12. Microphone incorporates unique boost circuitry, ensuring consistent performance even as battery power diminishes;

13. Ideal operating range extends up to 100 meters, suitable for diverse application environments;

14. Features infrared auto-tuning functionality, enabling rapid synchronization of the microphone to the receiver’s active channel.

 

Technical Specifications:

Frequency Range: 640-690MHz

RF Generation Method: PLL

Modulation Method: FM (F3E)

RF Bandwidth: 50MHz

Number of Frequencies: 200 (250KHz intervals)

Signal-to-Noise Ratio: >98dB

Dynamic Range: >100dB

Distortion: <0.5%

Audio Frequency Response: 50Hz–18KHz

Operating Temperature: -18°C to 50°C

Frequency Synchronization Method: Infrared Frequency Pairing

 

Receiver

Receiving Method: Superheterodyne Double Conversion

First Intermediate Frequency: 110.6 MHz

Second Intermediate Frequency: 10.7 MHz

Sensitivity: -105 dBm (20 dB SINAD)

Noise Reduction Method: Noise, Field Strength, Digital Pilot

Keypad Lock: Yes

Engineering Lock: Power Cycle Count (Automatic once per 24 hours)

 

Transmitter

RF Frequency Accuracy ±5PPM

Nominal Frequency Deviation 25KHz (1KHz 100mV)

Maximum Frequency Deviation 45KHz

Harmonics -50dBc

Transmit Power: 20mW

Operating Current: <120mA

Power Supply: AA 1.5V*2

Smart Sensor Accelerometer + Gyroscope

 

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