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Welcome to contact Hangzhou Zansong Digital Co., Ltd.
ZANSONG K21
ZANSONG K21 WIRELESS LAVALIER MICROPHONE
DUAL COLLAR CLIP MIC SET – LATENCY <20MS – PERFECT 360° AUDIO PICKUP – SIMULTANEOUS RECORDING & CHARGING
1. VISUAL CHALLENGES & THE SOLUTION FROM ZANSONG VOICE
In the booming era of content creation and e-commerce livestreaming, audio quality directly dictates viewer retention rate. The biggest fear for creators and livestream hosts is audio-video desynchronization (audio lagging behind video), harsh ambient noise causing ear fatigue, or a phone running out of battery mid-stream during long marathon live sessions.
Part of the ZANSONG VOICE product lineup, the ZANSONG K21 Wireless Lavalier Microphone has been engineered as a high-standard audio solution for every video frame. Equipped with a dual transmitter configuration (2 collar clips), proprietary 2.5G transmission protocol, ultra-low latency under 20ms, and pass-through phone charging while recording, the ZANSONG K21 delivers crystal-clear, smooth audio with absolute lip-sync alignment.
2. KEY HIGHLIGHTS OF THE ZANSONG K21
⚡ Proprietary 2.5G Protocol & Latency <20ms – Perfect Audio-Video Sync
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High-Quality 2.5G Compression Algorithm: The ZANSONG K21 utilizes a dedicated 2.5GHz transmission protocol combined with Adaptive Frequency Hopping (AFH), ensuring stable signals and robust anti-interference performance even in complex electromagnetic environments.
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No Lip-Sync Lag: Guarantees ultra-low latency <20ms, ensuring lip movement and sound output always stay in perfect sync, completely eliminating the jarring "delayed voice" effect during video playback.
🎙️ 360° Omnidirectional HD Microphone – Captures Clear Audio From All Angles
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High Sensitivity -38dB: Built-in 360-degree omnidirectional HD microphone capsule with a wide frequency response of 20Hz – 20kHz captures every natural nuance of speech, no matter how you position yourself.
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Freedom of Movement: Stable wireless transmission range up to 20 meters allows you to walk around and present products comfortably without audio cutouts.
🔋 Ultra-Low Power Consumption & Simultaneous Phone Charging
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Optimized Power Efficiency: Ultra-low transmitter power consumption
<13mAand receiver consumption<20mAmaximize operational battery life. -
Pass-Through Receiver Charging: The receiver supports direct pass-through power connection to charge your phone while actively recording or streaming. You can confidently stream for hours on end without worrying about device shutdown.
🔌 Plug & Play – Multi-Device Compatibility
Simply pull the microphones out of the charging case to auto-pair instantly with no complicated setup required. The ZANSONG K21 is fully compatible with smartphones, tablets, and personal computers.
3. DETAILED TECHNICAL SPECIFICATIONS (ZANSONG K21)
| Feature | Technical Specifications |
| Brand |
ZANSONG
|
| Product Line |
ZANSONG VOICE (Wireless Lavalier Microphone Series)
|
| Model |
K21
|
| Material |
High-grade ABS plastic
|
| Configuration |
01 Charging Case + 02 Clip-on Microphones + 01 Receiver (1 to 2)
|
| Transmission Protocol |
2.5G Private Protocol (Adaptive Frequency Hopping)
|
| Transmission Frequency |
2402 – 2480MHz
|
| Signal Latency |
< 20ms (Audio & Video Synchronized)
|
| Transmission Distance |
20 meters (Unobstructed)
|
| Frequency Response |
20Hz – 20kHz
|
| Sensitivity |
-38dB
|
| Signal-to-Noise Ratio (SNR) |
58dB
|
| Power Consumption |
Transmitter < 13mA | Receiver < 20mA
|
| Max RF Output Level |
8dB
|
| Modulation Type (EDR) |
GFSK, π/4-DQPSK
|
| Power Supply / Charging Current |
Voltage 5V, Case charging current 300mA
|
4. PACKAGE INCLUDES (BOX CONTENTS)
The standard ZANSONG K21 packaging includes:
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01 x Portable Charging Case
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02 x Clip-on Lavalier Microphones (Collar Clips)
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01 x Signal Receiver
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01 x User Instruction Manual
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01 x Product Box
5. PRACTICAL APPLICATIONS (USE-CASES)
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Dual-Host Livestreaming (TikTok Shop / Shopee Live): The dual clip-on microphone design allows 2 co-hosts to converse smoothly, while pass-through phone charging via the receiver keeps the stream running continuously.
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Vloggers & Creators Filming TikTok / Reels: Compact wearable clip-on design with 360-degree audio capture keeps speech clear even when turning your head.
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Online Lecturers, Teachers & Podcasters: Reproduces authentic voice tones without audio lag, helping students stay focused and listen comfortably throughout lectures.
