1. Introduction and Overview
The BOYA BY-WM4 PRO K1 is a compact and user-friendly 2.4GHz wireless microphone system designed for capturing clear, high-quality audio. It is ideal for a wide range of applications including vlogging, live streaming, interviews, video recording, and more, compatible with smartphones, tablets, DSLR cameras, camcorders, and computers.
This system features a single transmitter (TX) and a single receiver (RX), offering a reliable audio solution for content creators. Its plug-and-play design ensures ease of use, allowing you to focus on your content without complex setup procedures.
Image: The BOYA BY-WM4 PRO K1 system, showing the transmitter, receiver, and included accessories.
2. What's in the Box
Upon unboxing your BOYA BY-WM4 PRO K1, you should find the following components:
- 1 x Belt-pack Transmitter (BY-WM4 PRO TX)
- 1 x Portable Receiver (BY-WM4 PRO RXD)
- 1 x Omnidirectional Lavalier Microphone
- 1 x Carrying Case
- 1 x 3.5mm to TRS Audio Output Cable (for cameras)
- 1 x 3.5mm to TRRS Audio Output Cable (for smartphones)
- 1 x Cold Shoe Holder
- 1 x Windproof Cotton (windscreen for lavalier mic)
- 2 x Back Clips (pre-attached to TX/RX)
- 1 x Portable Zipper Bag
Image: A visual representation of all items included in the BOYA BY-WM4 PRO K1 package.
3. Setup Guide
3.1. Component Identification
Familiarize yourself with the transmitter (TX) and receiver (RX) units and their respective ports and controls.
Image: Detailed diagram showing the microphone input, power switch, pair button, antenna, battery compartment, LINE OUT, headphone jack, volume controls, and cold shoe adapter on both the transmitter and receiver.
3.2. Battery Installation
Both the transmitter and receiver require two AAA batteries each (not included). To install:
- Slide open the battery compartment cover located at the bottom of each unit.
- Insert two AAA batteries, ensuring correct polarity (+/-).
- Close the battery compartment cover securely.
Image: Close-up of the battery compartment on the BOYA BY-WM4 PRO K1 unit, illustrating how to insert AAA batteries.
3.3. Initial Pairing and Connection
The transmitter and receiver are typically pre-paired at the factory for immediate use. If re-pairing is necessary, follow these steps:
- Ensure both the transmitter and receiver are powered off.
- Locate the small "Pair" button on both units.
- Using the included pairing pin (or a small, pointed object), press and hold the "Pair" button on both units simultaneously for a few seconds until the indicator lights flash rapidly, then turn solid blue, indicating successful pairing.
Once paired, connect the receiver to your recording device:
- For DSLR Cameras/Camcorders: Use the 3.5mm TRS to TRS audio output cable. Connect one end to the "LINE OUT" port on the receiver and the other end to the microphone input jack on your camera.
- For Smartphones/Tablets: Use the 3.5mm TRS to TRRS audio output cable. Connect the TRS end to the "LINE OUT" port on the receiver and the TRRS end to the headphone/microphone jack of your mobile device. (Note: Newer iPhone/Android models may require an additional adapter, not included).
- For Computers/Laptops: Depending on your computer's ports, you may use either the TRS or TRRS cable. Some laptops require a combo jack, while others have separate mic-in ports.
Image: Illustration of how to connect the BOYA BY-WM4 PRO K1 receiver to different devices like smartphones, tablets, DSLR cameras, and camcorders using the appropriate cables.
Video: "BOYA WM4 PRO K1 K2 K3 K4 Wireless Lavalier Microphone" - This video demonstrates the setup process, including battery installation, pairing, and connecting the microphone system to various devices like smartphones, tablets, and cameras. It also highlights the compact size and real-time monitoring feature.
4. Operating Instructions
4.1. Powering On/Off
To power on or off both the transmitter and receiver, slide the "ON/OFF" switch located on the side of each unit.
4.2. Microphone Placement
Attach the omnidirectional lavalier microphone to the subject's clothing, ideally about 6-8 inches (15-20 cm) below the chin, facing upwards. Use the included windproof cotton to reduce plosives and wind noise, especially in outdoor environments.
Image: A close-up view of the omnidirectional lavalier microphone with its clip and foam windscreen.
4.3. Audio Monitoring and Control
- Real-time Monitoring: The receiver features a 3.5mm headphone output jack. Plug in headphones to monitor your audio in real-time, ensuring optimal sound capture.
- Volume Control (Attenuation): The receiver has volume +/- buttons. Use these to adjust the attenuation level of the input signal, allowing you to fine-tune the audio output to your recording device.
- Mono/Stereo Mode: The receiver also includes a switch to select between mono and stereo recording modes, providing flexibility for different recording needs and post-production workflows.
4.4. Usage Scenarios
The BY-WM4 PRO K1 is versatile for various applications:
- Vlogging & YouTube Videos: Capture clear voiceovers and interviews for your video content.
- Live Streaming: Ensure professional audio quality for your live broadcasts on platforms like YouTube, Instagram, Facebook, and TikTok.
- Interviews: Ideal for one-on-one interviews, ensuring both voices are clearly recorded.
- Mobile Journalism: Lightweight and portable for on-the-go reporting.
- Online Teaching/Conferences: Provides clear audio for virtual meetings and educational content.
Image: Collage demonstrating the BOYA BY-WM4 PRO K1 being used in different settings such as vlogging, interviews, mobile journalism, reporting, podcasting, and online teaching.
5. Maintenance
To ensure the longevity and optimal performance of your BOYA BY-WM4 PRO K1 system, follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to clean the units. Avoid using harsh chemicals or abrasive materials.
- Storage: Store the microphone system in its carrying case when not in use to protect it from dust, moisture, and physical damage.
- Battery Care: Remove batteries from the units if they will not be used for an extended period to prevent battery leakage and damage.
- Cable Care: Handle cables gently. Avoid sharp bends or kinks that can damage the internal wiring.
- Environmental Conditions: Avoid exposing the units to extreme temperatures, direct sunlight, or high humidity.
6. Troubleshooting
If you encounter issues with your BOYA BY-WM4 PRO K1, refer to the following common troubleshooting tips:
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound or low sound output. |
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| Intermittent sound or static. |
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| Distorted audio. |
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7. Specifications
Detailed technical specifications for the BOYA BY-WM4 PRO K1 Wireless Lavalier Microphone System:
| Feature | Specification |
|---|---|
| Microphone Form Factor | Lavalier |
| Frequency Band | 2.4GHz (2405-2478MHz) |
| Frequency Response | 35Hz-14KHz ±3dB |
| Signal-to-Noise Ratio | 80 dB (or 84dB as per A+ content) |
| Distortion | 0.05% or less (32ff, 1KHz, 65mW output) |
| Audio Input Connector | 3.5mm mini jack |
| Power Requirements | 3V DC (Two AAA size batteries per unit) |
| Transmitter Dimensions (W/H/D) | 45mm x 70mm x 35mm (approx. 1.77 x 2.76 x 1.38 inches) |
| Receiver Dimensions (W/H/D) | 45mm x 70mm x 35mm (approx. 1.77 x 2.76 x 1.38 inches) |
| Transmitter Weight | 47g (Without battery) |
| Receiver Weight | 47g (Without battery) |
| Material | Acrylonitrile Butadiene Styrene |
| Connectivity Technology | Auxiliary (3.5mm TRS/TRRS) |
| Polar Pattern | Omnidirectional |
| Operating Range | Up to 60 meters (197 feet) without obstacle |
Image: Visual representation of the compact dimensions and lightweight design of the BOYA BY-WM4 PRO K1 receiver.
8. Warranty and Support
For warranty information, technical support, or any inquiries regarding your BOYA BY-WM4 PRO K1 Wireless Lavalier Microphone System, please refer to the official BOYA website or contact their customer service directly.
You can also visit the official BOYA store on Amazon for more product information and support resources: