# Wireless lavalier microphone system Boya BY-WM4 Pro-K4 — RF 2405–2478 MHz, 60 m range, bodypack receiver, handheld transmitter

**URL:** https://aio.lv/en/product--boya-by-wm4-pro-k4--3615842
**Data updated:** 2026-03-07 11:08 (EET)
**Category:** Microphones
**Manufacturer:** Boya
**Manufacturer code:** BY-WM4 Pro-K4
**EAN:** 6971008026764
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 219.49 €
**Prices and availability valid until:** 2026-07-24 23:59
**Price without VAT (21%):** 181.40 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--boya-by-wm4-pro-k4--3615842

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 16.07.2026 | free |
| Pickup points | 21.07.2026 | 1.89 EUR |
| Courier delivery to door | 21.07.2026 | 4.99 EUR |

## Summary description

Boya BY-WM4 Pro-K4 is a wireless lavalier microphone system with a bodypack receiver and a handheld transmitter. It operates in the 2405–2478 MHz RF band and offers up to 60 m wireless range. The system includes a lavalier microphone and uses RF wireless connectivity for speech and video capture, suitable for interviews, vlogging, presentations and field recording. Receiver size 82×30.7×12 mm, weight 12 g; transmitter 45×70×30 mm.

## Long description

The Boya BY-WM4 Pro-K4 is a wireless lavalier microphone system that includes a dual-channel bodypack receiver and two transmitters: a lavalier bodypack and a handheld microphone. Operating in the 2405–2478 MHz RF band (2.4 GHz), the system provides up to 60 m wireless range in open conditions and is designed for speech and video capture for interviews, vlogging, presentations and field recording. The compact receiver connects to iOS recording devices via an Apple MFi-certified Lightning connector and offers real-time monitoring through a 3.5 mm headphone output.
Advantages
The dual-channel receiver delivers two independent audio sources simultaneously to a single iOS device, simplifying two-person recordings without additional interfaces. The receiver’s small size and low weight make it easy to attach to mobile devices and carry during shoots. Digital 2.4 GHz transmission provides a stable wireless link over distances up to 60 m in unobstructed conditions. A built-in stereo/mono switch enables separate channel output or combined stereo, and a line-in jack on the transmitter accepts external line-level audio for greater flexibility in signal sources.
Suitable for
 Two-person vlogging and interviews
 Mobile journalism and field reporting
 Presentations, lectures and talks recorded to iPhone/iPad
 Video content creation for social media
Key specifications
 RF band: 2405–2478 MHz (2.4 GHz digital transmission)
 Maximum wireless range: up to 60 m (open line of sight)
 System configuration: dual-channel receiver with one lavalier bodypack transmitter and one handheld transmitter
 Receiver connectivity: Apple MFi-certified Lightning connector for iOS devices
 Monitoring: 3.5 mm headphone output on receiver
 Receiver dimensions: 82 × 30.7 × 12 mm; receiver weight: 12 g
 Transmitter dimensions (handheld): 45 × 70 × 30 mm
 Audio routing: stereo/mono switch on receiver; line-in jack on transmitter for external line-level sources
How to use
Attach the lavalier microphone to the bodypack transmitter and clip the receiver into the Lightning port of your iOS device. Power on both transmitters and the receiver, select the desired stereo or mono output on the receiver, and check the LED/status indicators to ensure proper connection. For real-time monitoring, plug headphones into the receiver’s 3.5 mm output and adjust levels on the recording device or in-camera app as needed. The transmitter’s line-in jack can accept external line-level sources when required; connect and verify levels before recording.
Usage recommendations
Position the lavalier microphone close to the speaker’s mouth but out of direct breath path to maintain clear speech capture. Maintain a clear line of sight where possible to maximize the 60 m range; walls and dense obstacles will reduce effective distance. Use the stereo/mono switch to record separate channels for two speakers or combine channels when a single mixed track is preferred. When recording with mobile devices, monitor audio through the headphone output and perform a short test recording to confirm levels and connectivity before starting extended takes.

## Specifications

| Feature | Value |
|---|---|
| Wireless range | 60 m |
| Microphone connectivity | RF wireless |
| Transmitter dimensions (WxDxH) | 45 x 70 x 30 |
| Transmitter weight | 47 g |
| Receiver type | Bodypack receiver |
| Transmitter type | Handheld transmitter |
| Number of microphones included | 2 |
| Microphone type | Lavalier microphone |
| Radio Frequency (RF) range | 2405 - 2478 |
| Microphone frequency response | 35 - 14000 |
| Microphone clip | Yes |
| Number of transmitters included | 2 |
| Number of receivers included | 1 |
| Microphone power source type | Battery |

### Microphone

| Feature | Value |
|---|---|
| Microphone mute | Yes |

### Weight & dimensions

| Feature | Value |
|---|---|
| Receiver dimensions (WxDxH) | 82 x 30.7 x 12 |
| Receiver weight | 12 g |

## FAQ

### How much does the Boya BY-WM4 Pro-K4 wireless lavalier microphone system cost, and is it available for purchase?

The price is 219.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 1 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 16.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can Boya BY-WM4 Pro-K4 wireless lavalier microphone system be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Boya products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Boya service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### Where can I download the instructions for Boya BY-WM4 Pro-K4 wireless lavalier microphone system?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/3615842/57095554_large.webp