BOYA BY-WM4 PRO RXD 2.4GHz Wireless Microphone Receiver for iOS Lightning Devices

With a 60-meter line-of-sight range and ultra-low 12ms latency, the BOYA BY-WM4 PRO RXD delivers broadcast-quality audio to your iPhone or iPad with zero cables. This MFi-certified Lightning receiver pairs instantly with the included BY-M1 Pro omnidirectional lavalier, turning any iOS device into a professional wireless recording rig.

Overview

The BY-WM4 PRO RXD is a compact single-channel receiver engineered for content creators, journalists, and mobile filmmakers who demand reliable wireless audio without the bulk. It plugs directly into the Lightning port of any compatible iOS device, drawing power from the host—no batteries required. The receiver’s 3.5mm headphone jack enables real-time monitoring, while the cold shoe mount keeps your setup tidy. The system operates on the interference-resistant 2.4GHz band with GFSK modulation, ensuring clean signal transmission even in crowded RF environments. The included BY-M1 Pro lavalier microphone captures clear, natural speech with an omnidirectional pickup pattern, and the transmitter runs on two standard AAA batteries for hours of continuous use.

What stands out

• MFi-certified Lightning connector for seamless iOS compatibility
• Exceptional 60m wireless range with stable 2.4GHz digital transmission
• Ultra-low latency (<12ms) for perfect audio-video sync
• Includes professional BY-M1 Pro omnidirectional lavalier microphone
• Real-time monitoring via 3.5mm headphone jack on receiver
• Powered directly by iOS device—no receiver batteries needed

Technical details

• Wireless Technology: 2.4GHz Digital
• Compatibility: iOS Devices (iPhone, iPad) with Lightning Port
• Receiver Connector: Apple Lightning (MFi Certified)
• Microphone Type: Omnidirectional Lavalier
• Operating Range: Up to 60 meters (197 feet) line-of-sight
• Frequency Response: 35Hz - 14kHz
• Signal-to-Noise Ratio (SNR): ≥84dB
• Distortion: ≤0.05%
• RF Output Power: 3mW
• Transmitter Power Source: 2 x AAA Batteries
• Receiver Power Source: Powered by iOS Device
• Audio Output (Receiver): Digital via Lightning
• Headphone Output (Receiver): 3.5mm TRS Jack for Monitoring
• Number of Channels: 1 (Single Channel)
• Modulation: GFSK
• Sampling Rate: 48kHz
• Bit Depth: 16-bit
• Latency: <12ms
• Included Microphone: BY-M1 Pro Omnidirectional Lavalier
• Mounting: Cold Shoe Mount (for transmitter)

Our verdict

The BOYA BY-WM4 PRO RXD is a game-changer for iOS content creators who need reliable wireless audio without the complexity. Its plug-and-play Lightning design, impressive range, and included pro-grade lavalier make it an unbeatable value for interviews, vlogs, and mobile journalism.