Introduction
Thank you for choosing KVIDIO Active Noise Cancelling Headphones. This manual provides detailed instructions for the proper use, setup, and maintenance of your new headphones. Please read this manual thoroughly before use to ensure optimal performance and longevity of your device.

Image: KVIDIO Active Noise Cancelling Headphones, featuring a sleek black over-ear design with adjustable headband and cushioned earcups.
What's in the Box
Upon unboxing your KVIDIO Active Noise Cancelling Headphones, please verify that all the following components are included:
- KVIDIO Wireless Headphones (1 unit)
- 3.5mm Audio Cable (1 unit)
- USB-C Charging Cable (1 unit)
- User Manual (This document)
Video: A brief overview of the package contents for the KVIDIO WH304 headphones, showing the headphones, charging cable, and audio cable.
Product Overview
Familiarize yourself with the physical features and controls of your KVIDIO headphones:
- Earcups: Soft, high-protein leather earcups designed for comfort during extended use.
- Headband: Adjustable metal headband for a secure and comfortable fit.
- Controls: Integrated media controls for playback, volume, and call management.
- Ports: USB-C charging port and 3.5mm audio jack for wired connection.
- Microphone: Built-in microphone for hands-free calls.

Image: Detailed view of KVIDIO headphones highlighting the high-protein leather earpads, adjustable metal headband, and rotatable soft earcups for enhanced comfort.
Video: A quick product overview video demonstrating the KVIDIO headphones' design and key features.
Setup
1. Charging the Headphones
Before first use, fully charge your headphones. Connect the USB-C charging cable to the headphone's charging port and the other end to a USB power source (e.g., wall adapter, computer USB port). The LED indicator will show charging status and turn off when fully charged. A full charge takes approximately 2.5 hours.
2. Powering On/Off
- Power On: Press and hold the Power button for 3 seconds until the LED indicator flashes blue.
- Power Off: Press and hold the Power button for 3 seconds until the LED indicator turns red and then off.
3. Bluetooth Pairing
- Ensure the headphones are powered off.
- Press and hold the Power button for 5 seconds until the LED indicator flashes red and blue alternately, indicating pairing mode.
- On your device (smartphone, tablet, computer), enable Bluetooth and search for available devices.
- Select 'KVIDIO WH304A' from the list of devices.
- Once connected, the LED indicator will slowly flash blue.
The headphones support Bluetooth 5.3 for stable and efficient connection.
Operating Instructions
Active Noise Cancellation (ANC) & Transparency Mode
Your KVIDIO headphones feature advanced noise-cancelling technology to reduce ambient sound and a transparency mode to stay aware of your surroundings.
- ANC On/Off: Press the ANC button once to toggle Active Noise Cancellation on or off. When ANC is active, the LED will illuminate green.
- Transparency Mode: Press the ANC button twice quickly to activate Transparency Mode. This allows ambient sounds to pass through, enabling you to hear your surroundings without removing the headphones.

Image: Illustration of KVIDIO headphones utilizing Hybrid Active Noise Cancelling Technology in various environments, demonstrating its effectiveness in reducing external noise.
Music Playback
- Play/Pause: Press the Multi-function button once.
- Volume Up: Press the Volume + button.
- Volume Down: Press the Volume - button.
- Next Track: Press and hold the Volume + button.
- Previous Track: Press and hold the Volume - button.

Image: A visual representation of the KVIDIO headphones' deep bass and stereo sound capabilities, accompanied by a graph demonstrating the reduction of noise and ambient sound with Active Noise Cancellation (ANC).
Call Management
- Answer/End Call: Press the Multi-function button once.
- Reject Call: Press and hold the Multi-function button for 2 seconds.
- Redial Last Number: Double-press the Multi-function button.
Multi-Point Connection
The KVIDIO WH304A headphones support connecting to two Bluetooth devices simultaneously, allowing seamless switching between audio sources.
Video: Demonstration of the multi-point connection feature of the WH304 ANC headphones, showing how to connect to and switch between multiple devices.
Wired Mode
For extended use or when Bluetooth is not available, you can use the included 3.5mm audio cable to connect the headphones to your device. In wired mode, the headphones will function passively, and ANC features may not be available or may have reduced performance depending on battery level.
Maintenance
- Cleaning: Use a soft, dry cloth to clean the headphones. Do not use abrasive cleaners or solvents.
- Storage: Store the headphones in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: To preserve battery life, charge the headphones regularly, even if not in frequent use. Avoid fully discharging the battery for extended periods.
- Water Resistance: These headphones are not water-resistant. Avoid exposure to water or excessive moisture.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Headphones won't power on | Low battery | Charge the headphones fully. |
| Cannot pair via Bluetooth | Headphones not in pairing mode / Device Bluetooth off | Ensure headphones are in pairing mode (flashing red/blue). Turn on Bluetooth on your device. Forget previous pairings and try again. |
| No sound | Volume too low / Not connected / Wrong audio source | Increase volume on headphones and device. Confirm successful Bluetooth connection. Check audio output settings on your device. |
| ANC not working effectively | ANC not activated / Improper fit | Press the ANC button to activate. Adjust headphones for a snug fit over your ears. |
| Short battery life | Battery not fully charged / Old battery | Ensure full charge. Battery life naturally degrades over time. |
Specifications
| Feature | Detail |
|---|---|
| Model Name | WH304A |
| Noise Control | Active Noise Cancellation |
| Connectivity Technology | Wireless (Bluetooth), Wired (3.5mm Jack) |
| Wireless Communication Technology | Bluetooth 5.3 |
| Bluetooth Range | 10 Meters |
| Battery Life | Up to 70 Hours (Standard Music Mode), Up to 40 Hours (ANC Mode) |
| Charging Time | Approx. 2.5 Hours (5 min charge for 4 hours playtime) |
| Audio Driver Type | Dynamic Driver |
| Frequency Range | 20 Hz - 20,000 Hz |
| Impedance | 32 Ohm |
| Ear Placement | Over Ear |
| Material | Plastic |
| Item Weight | 12.3 ounces |
| Product Dimensions | 5.51 x 2.76 x 4.72 inches |

Image: KVIDIO headphones emphasizing their ultra-long playing time of up to 70 hours.
Warranty and Support
KVIDIO provides customer support for any inquiries regarding your headphones. The package includes a user manual and essential cables. For further assistance or warranty information, please refer to the contact details provided with your purchase or visit the official KVIDIO website.
Please feel free to contact us for any inquiries.


