1. Introdução e maisview
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. O que está na caixa
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 Estojo de transporte
- 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. Guia de configuração
3.1. Identificação do componente
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. Instalação da bateria
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.
- Insira duas pilhas AAA, certificando-se da polaridade correta (+/-).
- Feche bem a tampa do compartimento da bateria.

Image: Close-up of the battery compartment on the BOYA BY-WM4 PRO K1 unit, illustrating how to insert AAA batteries.
3.3. Emparelhamento e Conexão Iniciais
The transmitter and receiver are typically pre-paired at the factory for immediate use. If re-pairing is necessary, follow these steps:
- Certifique-se de que tanto o transmissor quanto o receptor estejam desligados.
- 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:
- Para câmeras DSLR/filmadoras: 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.
- Para 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. Instruções de operação
4.1. Ligar / desligar
To power on or off both the transmitter and receiver, slide the "ON/OFF" switch located on the side of each unit.
4.2. Posicionamento do Microfone
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.

Imagem: Um close-up view of the omnidirectional lavalier microphone with its clip and foam windscreen.
4.3. Audio Monitoring and Control
- Monitoramento em tempo real: 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.
- Modo Mono/Estéreo: 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. Cenários de uso
The BY-WM4 PRO K1 is versatile for various applications:
- Vlogging & YouTube Videos: Capture clear voiceovers and interviews for your video content.
- Transmissão ao vivo: 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. Manutenção
To ensure the longevity and optimal performance of your BOYA BY-WM4 PRO K1 system, follow these maintenance guidelines:
- Limpeza: Use um pano macio e seco para limpar os aparelhos. Evite usar produtos químicos agressivos ou materiais abrasivos.
- Armazenar: Store the microphone system in its carrying case when not in use to protect it from dust, moisture, and physical damage.
- Cuidados com a bateria: Remove batteries from the units if they will not be used for an extended period to prevent battery leakage and damage.
- Cuidados com os cabos: Handle cables gently. Avoid sharp bends or kinks that can damage the internal wiring.
- Condições ambientais: Evite expor os aparelhos a temperaturas extremas, luz solar direta ou alta umidade.
6. Solução De Problemas
If you encounter issues with your BOYA BY-WM4 PRO K1, refer to the following common troubleshooting tips:
| Problema | Possível causa | Solução |
|---|---|---|
| Sem som ou com volume de som muito baixo. |
|
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| Ruído intermitente ou estática. |
|
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| Áudio distorcido. |
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7. Especificações
Detailed technical specifications for the BOYA BY-WM4 PRO K1 Wireless Lavalier Microphone System:
| Recurso | Especificação |
|---|---|
| Fator de forma do microfone | Lavalier |
| Banda de frequência | 2.4 GHz (2405-2478 MHz) |
| Resposta de frequência | 35Hz-14KHz ±3dB |
| Sinal-Ruído | 80 dB (or 84dB as per A+ content) |
| Distorção | 0.05% or less (32ff, 1KHz, 65mW output) |
| Conector de áudio de entrada | Mini conector de 3.5 mm |
| Requisitos de energia | 3V DC (Two AAA size batteries per unit) |
| Transmitter Dimensions (W/H/D) | 45 mm x 70 mm x 35 mm (aproximadamente 1.77 x 2.76 x 1.38 polegadas) |
| Receiver Dimensions (W/H/D) | 45 mm x 70 mm x 35 mm (aproximadamente 1.77 x 2.76 x 1.38 polegadas) |
| Peso do transmissor | 47g (sem bateria) |
| Peso do receptor | 47g (sem bateria) |
| Material | Estireno de acrilonitrila-butadieno |
| Tecnologia de Conectividade | Auxiliary (3.5mm TRS/TRRS) |
| Padrão polar | Omnidirecional |
| Faixa de operação | 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. Garantia e Suporte
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 ou entre em contato diretamente com o atendimento ao cliente.
You can also visit the official BOYA store on Amazon for more product information and support resources: