Introduction
Thank you for choosing the OSA Wireless Lavalier Microphone. This 3-in-1 system is designed for clear audio capture across various devices, including iOS, Android, cameras, and PCs. Featuring intelligent noise reduction, omnidirectional sound pickup, and a portable design, it is ideal for video recording, vlogging, live streaming, interviews, and online meetings. This manual provides detailed instructions for setup, operation, and maintenance to ensure optimal performance.
Package Contents
Please verify that all items are present in your package:
- 2 x Microphone Transmitters
- 1 x 3-in-1 Receiver (USB-C, Lightning, 3.5mm Jack)
- 3 x Charging Cables
- 1 x User Manual
- 1 x Storage Bag
- 1 x Storage Box

Image: All components included in the OSA Wireless Lavalier Microphone kit.
Product Overview
The OSA Wireless Lavalier Microphone system consists of two compact microphone transmitters and a versatile 3-in-1 receiver.

Image: The complete OSA Wireless Lavalier Microphone kit.

Image: Detail of a single microphone transmitter with its wind muff.

Image: The 3-in-1 receiver, compatible with multiple device types.
Setup Guide
Universal Receiver Compatibility
The 3-in-1 receiver is designed for broad compatibility, supporting iOS devices (iPhone/iPad), Android smartphones and tablets, cameras, and PCs. It features USB-C, Lightning, and 3.5mm jack connectors.

Image: Universal receiver compatibility with various devices.
Quick Start Steps
- Connect the Receiver: Select the appropriate adapter cable (USB-C, Lightning, or 3.5mm jack) on the receiver and plug it into your recording device (smartphone, camera, or PC).
- Power On Microphones: Press and hold the power button on both the receiver and the microphone transmitters for 3 seconds. The blue light on the receiver and the green light on the transmitters will illuminate, indicating they are powered on and attempting to pair.
- Start Recording: Once the green light on both the microphone and receiver remains solid, the devices are successfully connected. You can now open your recording application and begin capturing audio.

Image: Connecting the receiver to an iOS device.

Image: Powering on the microphone for pairing.
Video: This video demonstrates the unboxing, the 360-degree rotating clip, connecting the 3-in-1 receiver to various devices (3.5mm jack, USB-C, Lightning), and the simple plug-and-play pairing process for the microphones.
Operation
Intelligent Noise Reduction
The OSA microphone features an integrated smart chip and high-density sponge to effectively cancel out environmental noise. This intelligent noise reduction technology ensures crystal-clear audio, making your recordings sound professional even in noisy environments. Manual noise reduction is also available for enhanced control.

Image: Visual representation of intelligent noise reduction in action.
Omnidirectional Sound Pickup
Equipped with a highly sensitive microphone, the OSA lavalier microphone offers 360-degree omnidirectional sound pickup. This ensures comprehensive audio capture from all directions, making it suitable for various recording situations without needing precise microphone placement.

Image: Illustration of 360-degree omnidirectional sound capture.
Wireless Transmission Range
The advanced 2.4 GHz transmission technology provides a stable wireless connection up to 65 feet (20 meters), ensuring ultra-low latency for real-time audio synchronization with video. This allows for flexible movement during recording without compromising audio quality.
Usage Scenarios
The OSA Wireless Lavalier Microphone is versatile and suitable for a wide range of applications:
- Interviews: Capture clear dialogue from multiple speakers.
- Vlogging & YouTube: Enhance audio quality for your video content.
- TikTok & Live Streaming: Deliver professional-sounding broadcasts.
- Online Meetings & Conferences: Ensure clear communication.
- Podcasting: Record high-quality audio for your episodes.

Image: Examples of the microphone in use across different scenarios.
Charging the Device
The microphone transmitters and receiver are equipped with rechargeable batteries. A full charge provides over 8 hours of working time, and a complete recharge takes approximately 80 minutes.
- Connect the provided charging cables to the charging ports on the microphone transmitters and the receiver.
- Plug the other end of the charging cables into a standard USB power source (e.g., wall adapter, computer USB port).
- The indicator light will show charging status (typically red for charging, off or green for fully charged).

Image: Simultaneous charging of microphones and receiver.

Image: Battery life indication.
Technical Specifications
| Feature | Specification |
|---|---|
| Model Number | K30 |
| Brand | OSA |
| Microphone Form Factor | Lavalier Microphone |
| Connectivity Technology | Wireless (2.4 GHz), USB, TRS 3.5 mm |
| Connector Type | 3.5 mm Jack, Lightning, USB-C |
| Compatible Devices | Digital Receiver, Smartphone, Camera, Tablet, PC |
| Polar Pattern | Omnidirectional |
| Signal-to-Noise Ratio | 65 dB |
| Power Source | Battery Powered |
| Working Time | 8+ Hours |
| Wireless Range | Up to 65 feet (20 meters) |
| Special Features | Clip, Noise Reduction, Battery Indicator Light |
| Item Weight | 150 Grams |
| Material | Plastic |
Troubleshooting
If you encounter any issues with your OSA Wireless Lavalier Microphone, please refer to the following common solutions:
- No Sound/Poor Audio Quality:
- Ensure both the microphone transmitters and the receiver are fully charged and powered on.
- Verify that the receiver is securely plugged into your recording device.
- Check if the indicator lights on both devices are solid green, indicating a successful connection.
- Confirm that your recording device's audio input settings are configured to use the external microphone. Some Android devices may require a third-party camera app (e.g., Open Camera) to recognize external microphones.
- Move closer to the receiver to ensure you are within the 65-foot operating range.
- Check for any obstructions or strong electromagnetic interference that might affect the wireless signal.
- Connection Issues:
- Turn off both the microphones and the receiver, then power them on again to re-initiate the pairing process.
- Ensure the correct adapter (USB-C, Lightning, or 3.5mm) is used for your device.
- Short Battery Life:
- Ensure the devices are fully charged before use. Charging takes approximately 80 minutes.
- Avoid extreme temperatures, which can affect battery performance.
Warranty and Customer Support
For warranty information, technical support, or any questions regarding your OSA Wireless Lavalier Microphone, please refer to the contact details provided with your purchase or visit the official OSA website. Our customer support team is available to assist you with any product-related inquiries.