1. Introduzione e oltreview
The BOYA BY-WM4 PRO-K3 is an incredibly lightweight, ultracompact, and easy-to-use 2.4GHz wireless microphone system designed to deliver detailed, broadcast-quality sound. It is specifically optimized for use with iPhone, iPad, iPod, and other iOS mobile devices equipped with a Lightning connector. This system provides a reliable audio solution for various applications, including filmmaking, broadcast interviews, business presentations, vlogging, and live streaming, offering clear audio capture without distance limitations.
2. Caratteristiche del prodotto
- Ultracompact and Lightweight: Designed for maximum portability and ease of use.
- Tecnologia wireless a 2.4 GHz: Operates on the interference-free 2.4GHz spectrum, automatically hopping to free channels for stable audio transmission.
- Microfono incorporato: The transmitter features a high-quality built-in microphone, suitable for direct clip-on use.
- Lavalier Microphone Option: Includes a professional lavalier microphone for discreet placement and enhanced audio capture.
- Portata wireless: Achieves an impressive operating range of up to 164 feet (50 meters) in open areas.
- Design plug-and-play: Simple setup for immediate use with compatible devices.
- Real-time Headphone Monitoring: Allows users to monitor audio directly from the receiver.
- Switchable Mono/Stereo Mode: Offers flexibility for different recording needs.
- Sound Attenuation Buttons: Provides control over audio levels directly on the receiver.
3. Contenuto della confezione
Si prega di controllare il contenuto della confezione per assicurarsi che tutti gli articoli siano presenti e in buone condizioni.
- BY-WM4 PRO Transmitter (TX)
- BY-WM4 PRO Receiver (RXD) with Lightning Connector
- Microfono Lavalier
- Foam Windscreen for Lavalier Microphone
- Clip per microfono
- Custodia rigida da trasporto
- Manuale d'uso

Figura 3.1: Oltreview of the BOYA WM4 PRO-K3 system components.

Figure 3.2: Retail packaging for the BOYA WM4 PRO-K3.
4. Identificazione dei componenti
4.1 BY-WM4 PRO Transmitter (TX)

Figure 4.1: BY-WM4 PRO Transmitter (TX) overview.
- LED di potenza: Indica lo stato di alimentazione e l'associazione.
- Ingresso linea: Ingresso da 3.5 mm per sorgenti audio esterne.
- Ingresso microfono: 3.5mm input for the lavalier microphone.
- Antenna: Per la trasmissione del segnale wireless.
- Spegnimento/accensione: Interruttore a scorrimento per accendere o spegnere l'unità.
- Pulsante di coppia: Used for connecting the signal with the receiver.
- Clip: For attaching the transmitter to clothing or a belt.
4.2 BY-WM4 PRO Receiver (RXD)

Figure 4.2: BY-WM4 PRO Receiver (RXD) overview.
- Connettore Lightning: For direct connection to iOS devices.
- LED di potenza: Indica lo stato di alimentazione e l'associazione.
- Built-in Internal Antenna: Per la ricezione del segnale wireless.
- Interruttore M/S: Toggles between Mono and Stereo output modes.
- Pulsante di coppia: Used for connecting the signal with the transmitter.
- Volume +/-: Regola il livello di uscita audio.
- Jack per cuffie: Uscita da 3.5 mm per il monitoraggio audio in tempo reale.
5. Impostazione
- Installa le batterie: Both the Transmitter (TX) and Receiver (RXD) units require two AAA batteries each. Open the battery compartment on the back of each unit and insert the batteries, ensuring correct polarity.
- Collegare il ricevitore al dispositivo: Plug the Lightning connector of the RXD receiver directly into the Lightning port of your iPhone, iPad, or iPod.
- Connect Lavalier Microphone: Plug the 3.5mm jack of the lavalier microphone into the 'MIC/LINE IN' port on the TX transmitter. Secure the lavalier microphone to your clothing, approximately 6-8 inches from your mouth, using the included clip.
- Unità di accensione: Slide the 'ON/OFF' switch on both the TX transmitter and RXD receiver to the 'ON' position. The Power LED indicators on both units should light up.
- Abbinamento (se necessario): The transmitter and receiver are pre-paired from the factory. If they do not connect automatically (indicated by a solid blue Power LED on both units), press and hold the 'Pair' button on both the TX and RXD units simultaneously until the blue LED stops blinking and remains solid. This indicates a successful connection.

Figure 5.1: Initial setup of the BOYA WM4 PRO-K3 with a smartphone.

Figure 5.2: Receiver connected to a smartphone for recording.
6. Istruzioni per l'uso
- Registrazione: Once the transmitter and receiver are successfully paired, open your preferred video recording application on your iOS device. The audio input will automatically switch to the BY-WM4 PRO-K3 system. Begin recording as usual.
- Monitoraggio audio: For real-time audio monitoring, plug headphones into the 3.5mm headphone jack on the RXD receiver. This allows you to hear the audio being captured by the microphone.
- Regolazione del volume: Use the 'Volume +/-' buttons on the RXD receiver to adjust the output audio level to your recording device or headphones.
- Modalità Mono/Stereo: The RXD receiver features an 'M/S' switch. 'M' stands for Mono, which combines all audio channels into a single output. 'S' stands for Stereo, which keeps the left and right audio channels separate. Choose the mode that best suits your recording needs.
- Portata wireless: Maintain the transmitter within the optimal operating range of up to 164 feet (50 meters) from the receiver for best performance. Obstacles and interference can reduce this range.

Figure 6.1: Using the BOYA WM4 PRO-K3 for mobile video recording.

Figure 6.2: The BOYA WM4 PRO-K3 in an interview collocamento.

Figure 6.3: Wireless operation range.
6.1 Official Product Video: 2.4G Wireless Microphone Lavalier for Smartphone DSLR Camera
Questo video fornisce una panoramica completaview of the BOYA WM4 PRO-K3, demonstrating its features, setup, and usage scenarios with both smartphones and DSLR cameras. It highlights the compact design, ease of use, and audio quality for various content creation needs.
7. Manutenzione
- Pulizia: Utilizzare un panno morbido e asciutto per pulire le unità. Non utilizzare prodotti chimici aggressivi o materiali abrasivi.
- Sostituzione della batteria: Replace batteries when the Power LED indicator starts blinking or turns off, indicating low power. Always use fresh AAA batteries.
- Magazzinaggio: When not in use for extended periods, remove the batteries from both units to prevent leakage and store the system in its provided carrying case in a cool, dry place.
- Maneggiare con cura: Avoid dropping the units or exposing them to extreme temperatures, moisture, or dust.
8. Risoluzione Dei Problemi
- Nessuna uscita audio:
- Ensure both the transmitter and receiver are powered on and their Power LEDs are solid blue (indicating successful pairing).
- Controllare i livelli della batteria e sostituirla se è scarica.
- Verify the lavalier microphone is securely plugged into the transmitter's 'MIC/LINE IN' port.
- Confirm the receiver is correctly plugged into your iOS device's Lightning port.
- Check the volume level on the receiver and your recording device.
- Scarsa qualità audio/interferenze:
- Ensure the transmitter is within the optimal operating range (within 50 meters/164 feet) and there are no major obstacles between the units.
- Avoid environments with strong 2.4GHz interference (e.g., near Wi-Fi routers, other wireless devices).
- Check the lavalier microphone placement to avoid rubbing against clothing.
- Ensure the lavalier's foam windscreen is properly installed to reduce wind noise.
- Unità non abbinate:
- Spegnere e riaccendere entrambe le unità.
- Manually re-pair the units by pressing and holding the 'Pair' button on both the TX and RXD simultaneously until the blue LED becomes solid.
9. Specifiche
| Specificazione | Valore |
|---|---|
| Marca | RAGAZZO |
| Nome del modello | WM4 PRO-K3 |
| Fattore di forma del microfono | Sistema microfono |
| Modello polare | Omnidirezionale |
| Tecnologia di connettività | Senza fili (2.4 GHz) |
| Tipo di connettore | Fulmine |
| Fonte di alimentazione | Battery Powered (2x AAA per unit) |
| Sensibilità Audio | 63 dB |
| Signal-to-Noise Ratio | 84 dB |
| Peso dell'articolo | 1.7 once |
| Dimensioni del pacco | 6.73 x 4.65 x 2.24 pollici |
| Colore | Nero |
| Dispositivi compatibili | Personal Computer, Tablet, Fotocamera, Smartphone |
10. Garanzia e supporto
Specific warranty information and detailed support contacts are not available in this manual. Please refer to the product packaging or the official BOYA website for comprehensive warranty details and customer support options.





