WARM BOX WM-J3
WARM BOX Mini Wireless Lavalier Microphone User Manual
Model: WM-J3 (J3)
Introduction
This user manual provides comprehensive instructions for the operation, maintenance, and troubleshooting of your WARM BOX Mini Wireless Lavalier Microphone. Designed for ease of use and high-quality audio capture, this microphone system is compatible with a wide range of devices, including iPhones, Android phones, laptops, and tablets. Please read this manual thoroughly before using the product to ensure optimal performance and longevity.
Package Contents
Upon opening the package, please verify that all the following components are included:
- Wireless Lavalier Microphone x2
- Anti-Spray Sponge Heads x2
- Microphone Mounting Clip x2
- USB-C Port Wireless Receiver
- USB-C to Lightning Adapter
- USB-C to USB-A Adapter
- USB-C Charging Cable
- User Manual

Figure 1: Contents of the WARM BOX Mini Wireless Lavalier Microphone package.
Product Features
The WARM BOX Mini Wireless Lavalier Microphone is equipped with several advanced features to enhance your audio recording experience:
- Clear Audio & Stable Connection: Features an advanced DSP chip for crystal-clear sound and stable audio transmission up to 65 feet (20 meters) with minimal interference.
- Automatic Pairing: Designed for plug-and-play convenience, requiring no Bluetooth, apps, or internet connections. Simply plug in the receiver and power on the microphone for instant connection.
- Long Battery Life: Each microphone provides up to 7 hours of continuous use, totaling 14 hours when both microphones are used alternately.
- User-Friendly Functions: Includes one-touch controls for Mute, Noise Cancellation, and Reverb functions.
- Wide Compatibility: Supports a broad range of devices including iPhones, iPads, Android phones with Type-C, laptops, and desktops via included USB-C, USB-A, and Lightning adapters.

Figure 2: Smart Noise Reduction with Upgraded DSP.

Figure 3: Wireless Lavalier Microphone LED Display Indicators.

Figure 4: 100ft/30m Long-range Transmission Capability.

Figure 5: Battery Life and Charging Information.
Setup Guide
- Initial Charging: Before first use, ensure both microphones and the receiver are fully charged using the provided USB-C charging cable. The battery indicator on the microphone will show red when below 10% and off when sufficiently charged.
- Connect Receiver:
- For devices with a USB-C port (e.g., Android phones, newer iPhones, laptops): Directly plug the USB-C receiver into your device's USB-C port.
- For iPhones/iPads with a Lightning port: Attach the USB-C to Lightning adapter to the USB-C receiver, then plug the assembly into your device's Lightning port.
- For devices with a USB-A port (e.g., older laptops, desktops): Attach the USB-C to USB-A adapter to the USB-C receiver, then plug the assembly into your device's USB-A port.
- Power On Microphone: Press and hold the power button on the microphone for 3 seconds until the connection indicator light blinks.
- Automatic Pairing: The microphone will automatically pair with the receiver. The connection indicator light will become steady (not blinking) once successfully connected. No additional apps or Bluetooth settings are required.

Figure 6: Auto Pairing Process.

Figure 7: Wide Compatibility with various devices.
Operating Instructions
The microphone features intuitive controls for various functions:
- Power On/Off: Press and hold the power button for 3 seconds.
- Mute Function: Double-tap the power button to mute or unmute the microphone. The mute indicator will turn on when muted.
- Noise Reduction Function: Press the power button once to toggle noise reduction on or off. The noise reduction indicator will turn on when active.
- Reverb Function: Triple-click the power button to activate or deactivate the reverb effect. This feature is particularly useful for music recording or adding depth to voice.
- Charging While Recording: The receiver features a Type-C port, allowing you to charge your phone or device simultaneously while recording, ensuring uninterrupted sessions.

Figure 8: Multifunctional Wireless Microphone Controls.

Figure 9: Charging your phone while recording video.
Maintenance
To ensure the longevity and optimal performance of your WARM BOX Mini Wireless Lavalier Microphone, follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to wipe the microphone and receiver. Do not use liquid cleaners or solvents, as they may damage the device.
- Storage: Store the microphone system in a cool, dry place away from direct sunlight and extreme temperatures. When not in use for extended periods, ensure the devices are fully charged before storage.
- Handling: Avoid dropping or subjecting the microphone and receiver to strong impacts. Handle adapters carefully to prevent bending or breaking pins.
- Sponge Heads: The anti-spray sponge heads can be gently removed and cleaned if necessary. Ensure they are completely dry before reattaching.
Troubleshooting
If you encounter any issues with your WARM BOX Mini Wireless Lavalier Microphone, please refer to the following troubleshooting steps:
| Problem | Possible Cause | Solution |
|---|---|---|
| Microphone not connecting/pairing. |
|
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| Poor audio quality (noise, distortion). |
|
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| Microphone not responding to function presses (mute, reverb). |
|
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| No sound recorded or output. |
|
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Specifications
| Feature | Detail |
|---|---|
| Model Name | WM-J3 (J3) |
| Brand | WARM BOX |
| Microphone Form Factor | Lavalier |
| Connectivity Technology | USB (Wireless) |
| Connector Type | USB-C (with Lightning and USB-A adapters) |
| Polar Pattern | Unidirectional |
| Frequency Response | 2.4 GHz |
| Audio Sensitivity | 50 dB |
| Signal-to-Noise Ratio | 80 dB |
| Number of Channels | 2 |
| Power Source | Battery Powered |
| Battery Type | Lithium (2 CR5 batteries included) |
| Battery Life (Single Mic) | Up to 7 hours |
| Charging Time | Approximately 1.5 hours |
| Item Weight | 80 Grams (2.82 ounces) |
| Product Dimensions (L x W x H) | 1.18 x 0.78 x 0.79 inches |
| Material | Plastic |
| Compatible Devices | Laptop, Smartphone, Tablet |
| Recommended Uses | Indoor/Outdoor recording, Vlogging, Video Recording, Live Streaming, Online Teaching, Interviews. |
Warranty and Support
The WARM BOX Mini Wireless Lavalier Microphone comes with a 1-year warranty from the date of purchase. Additionally, a 30-day free return policy is offered. For warranty claims, technical support, or any inquiries regarding your product, please contact the manufacturer or the seller directly through your purchase platform.
Please retain your proof of purchase for warranty validation.
Important Safety Information
- Do not disassemble, repair, or modify the device.
- Keep the device away from water, fire, flammable gases, and corrosive substances.
- Avoid exposing the device to extreme temperatures or high humidity.
- Dispose of batteries and electronic components responsibly according to local regulations.
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