Introduction
Thank you for choosing the MAIRDI Mono 809G 3.5mm Headset. This instruction manual provides detailed information on how to set up, operate, and maintain your headset to ensure optimal performance and longevity. This headset is designed for clear communication and comfort across various platforms.
Product Overview
The MAIRDI Mono 809G headset features a noise-canceling microphone and wideband audio for crystal-clear conversations. Its lightweight design and adjustable components ensure comfort during extended use. The headset is built with durable materials for reliability.


Setup & Connectivity
The MAIRDI Mono 809G headset offers wide compatibility and easy plug-and-play setup.
Compatibility:
- Compatible with most smartphones (Android, Samsung, iPhone, iPad, iPod), PC laptops, and computers with a single 3.5mm headset port.
- For iPhone 7/7 Plus/8/8 Plus/X/XS/XR or newer models, a Lightning to 3.5mm adapter (supplied by Apple) is required.
Connection Steps:
- Locate the 3.5mm headset port on your device (smartphone, laptop, or computer).
- Plug the 3.5mm jack of the headset into the device's port.
- If your computer has separate audio and microphone jacks, use the included 3.5mm headset splitter (Y-adapter) to connect the headset.


Operating Instructions
Using the In-line Controls:
- Volume Control: Use the volume wheel on the in-line control unit to adjust the listening volume.
- Microphone Mute: Slide the mute switch to enable or disable the microphone.
- Call Answer/End: Press the call button on the in-line control unit to answer or end calls.
Microphone Adjustment:
- The microphone boom is 330° rotatable, allowing you to position it on either the left or right side of your head.
- The gooseneck flexible mic arm can be bent and adjusted to bring the microphone closer to your mouth for optimal voice pickup and noise canceling.
Comfort and Design
The Mono 809G headset is engineered for all-day comfort and durability.
- Adjustable Headband: The headband can be adjusted to fit various head sizes, ensuring a secure yet comfortable fit.
- Rotatable Earpiece: The soft leatherette ear cushion can rotate 180°, allowing it to sit properly on your ear without causing pain or pressure during long wearing periods.
- Durable Construction: Featuring a stainless steel headband and quality plastics, the headset is built to withstand daily heavy use. The reinforced cord is made with Kevlar to protect against damage from office chair wheels or sharp objects.

Specifications
| Feature | Detail |
|---|---|
| Model Name | Mono 809G |
| Connectivity Technology | Wired (3.5mm Jack) |
| Microphone | Noise Canceling, 330° Rotatable Boom |
| Audio Quality | Wideband Audio, HD Audio Sound |
| Ear Placement | On Ear (Monaural) |
| Control Type | In-line Controller (Volume, Mic Mute, Call Answer/End) |
| Material | Leather, Plastic, Stainless Steel |
| Cable Feature | Reinforced with Kevlar |
| Item Weight | 4.2 ounces (120 Grams) |
| Product Dimensions | 98.43 x 2.56 x 1.06 inches |
| Included Components | Headset, 3.5mm Headset Splitter (Y-adapter) |
Troubleshooting
- No Sound/Microphone Not Working: Ensure the 3.5mm jack is fully inserted into the device. Check the volume control on the in-line unit and your device. Verify the microphone mute switch is in the 'unmute' position.
- Poor Audio Quality: Ensure the connection is secure. Test the headset with another device to rule out device-specific issues.
- Compatibility Issues with iPhone: Remember that iPhone 7 and newer models require a Lightning to 3.5mm adapter (not included) for connection.
Maintenance
- Cleaning: Use a soft, dry cloth to clean the headset. Avoid using harsh chemicals or abrasive materials.
- Storage: Store the headset in a cool, dry place away from direct sunlight and extreme temperatures. Avoid tangling the cable.
- Cable Care: The reinforced cable is designed for durability, but avoid excessive pulling or bending to prevent internal damage.
Warranty & Support
For warranty information and customer support, please refer to the documentation included with your purchase or visit the official MAIRDI website. Our support team is available to assist you with any questions or issues you may encounter.





