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BOYA BY-WM4 Pro Compact 2.4GHz Wireless Lavalier Microphone System
KSh 11,040.00
Technical Specifications
Category Specification
RF Modulation GFSK (Gauss Frequency Shift Keying)
Frequency Band 2.4 GHz (2405 MHz – 2478 MHz)
Operating Range Up to 60 meters (197 feet) line-of-sight without obstacles
Frequency Response 35 Hz – 14 kHz ($\pm 3\text{ dB}$)
Signal-to-Noise Ratio (SNR) 84 dB or more
Distortion (THD) 0.05% or less ($32\,\Omega, 1\text{ kHz}, 65\text{ mW}$ output)
BOYA BY-WM4 Pro Compact 2.4GHz Wireless Lavalier Microphone System
Achieve complete wireless freedom and crisp vocal recording with theBOYA BY-WM4 Pro. This ultra-compact, entry-level digital wireless microphone system is engineered for content creators, vloggers, mobile journalists, and videographers seeking an affordable, dependable cord-free audio setup. Operating on the globally clear 2.4GHz frequency band, the system automatically eliminates signal interference to deliver clear, intelligible speech directly to smartphones, tablets, DSLRs, camcorders, and PCs up to a line-of-sight range of 60 meters.
Technical Specifications
| Category | Specification |
| RF Modulation | GFSK (Gauss Frequency Shift Keying) |
| Frequency Band | 2.4 GHz (2405 MHz – 2478 MHz) |
| Operating Range | Up to 60 meters (197 feet) line-of-sight without obstacles |
| Frequency Response | 35 Hz – 14 kHz ($\pm 3\text{ dB}$) |
| Signal-to-Noise Ratio (SNR) | 84 dB or more |
| Distortion (THD) | 0.05% or less ($32\,\Omega, 1\text{ kHz}, 65\text{ mW}$ output) |
| RF Output Level | 3 mW |
| Audio Input Terminal | 3.5mm mini-jack (Transmitter) |
| Audio Output Terminal | 3.5mm line-out jack & 3.5mm headphone monitor jack (Receiver) |
| Power Requirements | 3V DC via 2x AAA batteries per unit (Transmitter & Receiver) |
| Battery Life | Approximately 11.5 hours of continuous operation (alkaline batteries) |
| Dimensions / Weight | 45mm x 70mm x 35mm | Weight: 47g per unit (lightweight plastic casing) |
BOYA BY-WM4 Pro Pros and Cons
Pros
- Universal Platform Compatibility: Arrives complete with individual 3.5mm TRS and TRRS audio lines, shifting seamlessly from mirrorless cameras to laptops and smartphones.
- Real-Time Audio Monitoring: The receiver incorporates a dedicated 3.5mm headphone port, allowing operators to monitor live audio quality and check for signal drops.
- Global License-Free Spectrum: Utilizes the digital 2.4GHz frequency band to prevent local television station overlap and regulatory headaches.
- Featherweight Form Factor: At just 47g per unit, the compact design won’t drag down clothing lines or over-encumber lightweight smartphone rigging cages.
- Long Battery Runtime: Runs for over 11 hours on standard, readily available AAA batteries, eliminating long charging downtime on production sets.
Cons
- AAA Battery Dependent: Lacks internal rechargeable lithium batteries; requires carrying spare alkaline or rechargeable AAA batteries to sets.
- Line-of-Sight Limitations: 2.4GHz frequencies struggle to penetrate physical barriers; turning your back to the receiver can cause minor signal dropouts.
BOYA BY-WM4 Pro Variations and Price Guide
| Model / Variation | Key Differences | Typical Price Range (KES) |
| BY-WM4 Pro-K1 (Single) | Includes 1x Transmitter, 1x Receiver, and 1x Omnidirectional Lavalier Mic. | 7,500 – 9,500 |
| BY-WM4 Pro-K2 (Dual Channel) | Includes 2x Transmitters, 1x Dual-Channel Receiver, and 2x Lavalier Mics for two-person interviews. | 11,500 – 14,500 |
| BY-WM4 Pro-K3 / K4 (Mobile) | Features an ultra-compact receiver that plugs directly into Lightning (iOS) or USB-C (Android) ports. | 9,500 – 12,500 |
BOYA BY-WM4 Pro Suitable Application Areas
- Vlogging & YouTube Interviews: Perfect for solo content creators and duo talk shows requiring wireless lapel microphones to keep hands completely free.
- Mobile Journalism (MoJo): Allows field reporters to quickly clip a microphone onto a subject during outdoor environment updates and street interviews.
- TikTok, Reels & Shorts Generation: Delivers clean voice-over presence directly into vertical video formats, preserving audio clarity when walking away from the lens.
- E-Learning & Virtual Teaching: Empowers remote instructors to move naturally across classroom lecture spaces while broadcasting clear audio over Zoom or Microsoft Teams.
Verdict
The BOYA BY-WM4 Pro remains a highly dependable option for step-up content creators entering wireless audio workflows. By combining license-free 2.4GHz digital transmission, real-time headphone monitoring, and simple plug-and-play architecture, it resolves distance and cable limitations without breaking the bank. It serves as an essential, pocket-sized upgrade for local video production ecosystems.
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