UL4

This four channel UHF one to four wireless microphone system equipped with RGB lighting effects is a cost-effective multi-user wireless audio device designed for scenarios such as family karaoke, multi-user meetings, small stage performances, teaching speeches, and store activities. Adopting DSP chip frequency locking technology, equipped with dual fixed frequency UHF transmission of 630.85MHz&661.85MHz, built-in noise reduction function and rechargeable battery design, equipped with four channel independent volume knob and high-definition LCD display screen, achieving a perfect combination of stable signal, high fidelity voice and ambient lighting, providing a convenient and efficient wireless pickup solution for multiple people to use at the same time.

Core Technologies & Performance Highlights

1. Fixed-Frequency UHF Transmission with DSP Chip Frequency Lock

Operates on two fixed UHF frequency bands: 630.85MHz & 661.85MHz, paired with DSP chip frequency locking technology for frequency stability of ±10ppm and RF power of 10dBm. Unlike traditional tunable devices, it requires no complex frequency searching or pairing. The system locks onto a stable frequency immediately upon power-up, completely eliminating signal drift. It also features strong anti-interference capabilities, effectively avoiding signal crosstalk from surrounding electronic devices such as mobile phones and WiFi routers. This ensures stable and pure four-channel audio transmission, supporting multiple simultaneous users without interference.

2. Low Distortion + Built-In Noise Reduction for High-Fidelity Vocals

• Audio Frequency Response: 70Hz~18kHz, fully covering the core vocal frequency range. It delivers rich, full bass, natural midrange, and clear, transparent treble, balancing the power needed for singing with the clarity required for speech.
• Distortion: Only 0.1%, capturing vocals with delicate realism, free from noise and clipping, to meet professional-grade vocal pickup requirements.
• Built-In Noise Reduction: Equipped with an internal noise reduction chip that effectively filters out environmental background noise, improving separation between vocals and background sounds. Clean vocals can be captured even in noisy gatherings or events.

3. Cardioid Dynamic Microphone Capsule for Precise Pickup and Anti-Feedback

Features a cardioid dynamic coil microphone capsule, designed to precisely focus on vocals from the front, significantly suppressing environmental noise and interference from the sides and rear, and effectively reducing the risk of feedback. It also enhances vocal clarity, adapting to the pickup needs of various scenarios such as multi-person turn-taking, stage choruses, and teaching speeches.

4. Stable 30-50 Meter Transmission Range

Optimized dual-antenna reception technology enables stable transmission over 30-50 meters in open environments. This meets the usage requirements of medium-to-long-distance scenarios such as home living rooms, small conference rooms, and store stages. Users are free to move while singing or speaking, completely breaking free from cable constraints for greater flexibility.

User-Friendly Design & Practical Functions

1. Four-Channel Independent High-Definition LCD Display

The receiver is equipped with an integrated high-definition LCD screen that simultaneously displays key operational data for CHANNEL 1-4:

• Operating frequency (e.g., 630.600MHz, 661.800MHz, etc.)
• Channel number and AF (Audio Frequency) / RF (Radio Frequency) signal status
• Battery level and audio level
• Real-time monitoring of each microphone's status, allowing users to clearly grasp the equipment's operation even when four users are using it simultaneously, for greater peace of mind.

2. Four Metal-Finish Rechargeable Microphones

• Handheld Microphones: Four handheld microphones with a premium metal-finish body design, offering an outstanding look and durability. The surface treatment enhances grip comfort, reducing fatigue during extended use.
• Built-In Rechargeable Battery: Each microphone supports 2-4 hours of continuous use. The long-lasting design eliminates the need for frequent battery replacements, offering an eco-friendly and convenient solution that reduces long-term usage costs.
• On-Board Display and Controls: Each microphone features a small display screen and operation labels, clearly showing the frequency and battery level for intuitive operation, making it easy for beginners to use.

3. Four-Channel Independent Volume Receiver with RGB Lighting

• Cool RGB Ambient Lighting: The front of the receiver features RGB lighting that creates a cool ambient effect when powered on. It is ideal for home karaoke parties, stage warm-ups, live streaming, and other scenarios, enhancing the overall atmosphere and visual experience.
• Four-Channel Independent Volume Knobs: Equipped with four sets of independent volume knobs: VOL1+, VOL2+, VOL3+, and VOL4+, allowing you to adjust the volume of each microphone separately. It flexibly adapts to the volume needs of four-person choruses, multi-user speeches, and different styles of singing.
• Compact Portable Body: With a small footprint, it requires no rack installation and can be placed directly on a desktop, making it ideal for home, small events, and mobile use.
• Dual High-Gain Antennas: Ensure stable signal reception, reducing transmission dead zones and guaranteeing the stability of all four channels working simultaneously.

Product Configuration

Microphone *4

Receiver *1

18650 batteries *4

Power adapter *1

Antenna *2

6.35 audio cable *1

Anti-drop ring *2

Anti-spray cotton *2

Charging cable *1

Weight: 1.36g

specification 28.5*24*12.3cm

Applicable Scenarios

✅ Home Multi-User Karaoke / Gatherings: The four-channel design allows four people to sing simultaneously. RGB lighting paired with clear vocals creates an immersive home party atmosphere.

✅ Small Stages / Multi-User Performances: The 30-50 meter transmission range and cardioid capsule are ideal for small commercial shows, campus events, wedding warm-ups, band choruses, and other multi-person pickup scenarios.

✅ Teaching / Meetings / Training: Four-channel independent pickup adapts to scenarios such as classroom group teaching, corporate meetings, training lectures, and store promotions requiring multiple speakers.

✅ Live Streaming / Short Video Production: The multi-user design and stable signal are perfect for indoor multi-person live streaming and short video shooting, improving overall sound quality.

Product Advantage Summary

Multi-User Compatibility

1-to-4 design with four independent working channels, meeting the simultaneous usage needs of 2-4 people.

Signal Stability

DSP frequency locking + dual fixed frequencies, ±10ppm high stability with no signal drift or frequency shifting.

Sound Quality Performance

70Hz-18kHz frequency response + 0.1% low distortion + built-in noise reduction for clear, delicate vocals with strong anti-noise capability.

Easy Operation

Ready to use right out of the box with no debugging required, four-channel independent volume knobs, dual-channel independent display, beginner-friendly.

Atmosphere & Battery Life

Built-in RGB lighting enhances the atmosphere, rechargeable microphones with 2-4 hours long battery life, eco-friendly and practical.

Scenario Coverage

30-50 meters stable transmission, adapting to multiple scenarios including home, stage, meeting, teaching, and live streaming.