BOYA M1DM Dual Microphone for recording and YouTube voice over 

BOYA BY-M1DM is a dual-head clip-on lavalier condenser microphone designed specifically for two-person voice recording. It features two omnidirectional microphone capsules attached to a single in-line power pack and terminates into a single 3.5mm TRRS connector.

This setup allows content creators, podcasters, journalists, vloggers, and interviewers to capture clear, balanced dialogue from two speakers simultaneously using just one camera, smartphone, audio recorder, or computer—without needing external audio splitters or mixers.

Feature Detail

• Dual-Head Capsule System: Two independent omnidirectional microphones feed into a single recording device, simplifying two-person interviews and host-guest podcasts.

• 360° Omnidirectional Sound Pickup: Both capsules capture audio evenly from all directions, ensuring consistent voice levels even if either speaker turns their head while talking.

• 4-Meter (13ft) Total Cable Length: Generous cable reach with approximately 2.8 meters (9.2 ft) between the two microphone heads, providing ample spacing for comfortable seated or standing interviews.

• In-Line Dual-Mode Switch: A physical power pack switch allows toggling between “OFF / Smartphone” mode (unpowered) and “Camera / ON” mode (battery-powered).

• Improved Signal-to-Noise Ratio (74dB): High sensitivity and flat frequency response help retain audio detail while minimizing low-level self-noise and electrical hiss.

Connectivity Options

Primary Output Connector

• 3.5mm (1/8″) 4-Pole (TRRS) Gold-Plated Plug: Single jack that outputs audio from both mic heads directly to the host device.

System Modes & Compatibility

1. OFF / Smartphone Mode:

   • Uses plug-in passive power directly from the host device’s 3.5mm audio port (no battery needed).

   • Compatible with: Smartphones, tablets, laptops, and PCs (with combo mic/headphone jacks).

2. Camera / ON Mode:

   • Powered by the internal LR44 button-cell battery in the power capsule.

   • Compatible with: DSLR cameras, mirrorless cameras, camcorders, dedicated audio recorders, and external mixers.

(Note: Modern smartphones or tablets without a 3.5mm headphone port require a standard USB-C to 3.5mm or Lightning to 3.5mm adapter).

Technical Specifications

What Comes in the Box?

• 1x BOYA BY-M1DM Dual Lavalier Microphone with Integrated 4m Cable & Power Pack

• 2x Metal Lapel Clips

• 2x Foam Windscreens

• 1x LR44 Button Cell Battery

• 1x 1/4″ (6.35mm) TRS Audio Adapter

• 1x Protective Carrying Pouch

• 1x User Manual

Why Is It Reliable?

1. Eliminates Extra Splitters: Having two lavalier mic heads wired to a single output plug removes the need for Y-adapters or dual-channel interfaces, reducing signal loss and potential failure points.

2. Smartphone Battery Efficiency: Uses passive power when connected to smartphones or PCs, meaning you never have to worry about a dead battery interrupting a mobile interview.

3. Gold-Plated Connector: The 3.5mm TRRS jack features corrosion-resistant gold plating that ensures strong contact, preventing static interference during movement.

4. Independent Placement Range: Generous length between the split cable points allows proper mic placement on two people without strain on the wires or capsules