Sony WH-CH400 Wireless Headphones User Manual

Introduction

This manual provides instructions for the safe and effective use of your Sony WH-CH400 Wireless Headphones. These headphones are designed for all-day listening, featuring Bluetooth connectivity with NFC one-touch pairing, up to 20 hours of battery life, and 30mm neodymium drivers for dynamic sound. The integrated microphone supports hands-free calling and voice assistant functions.

This image displays the Sony WH-CH400 Wireless Headphones in black. The headphones feature an on-ear design with a flexible headband and circular earcups, showcasing the Sony logo on one earcup.

What's in the Box

• Sony WH-CH400 Wireless Headphones
• Micro USB Cable for charging

Setup

1. Charging the Headphones

Before initial use, fully charge the headphones. Connect the supplied Micro USB cable to the charging port on the headphones and to a USB power source. The indicator light will show charging status. A full charge provides up to 20 hours of playback time.

2. Bluetooth Pairing

1. Ensure the headphones are powered off.
2. Press and hold the power button for approximately 7 seconds until the indicator light flashes blue and red alternately. This indicates pairing mode.
3. On your Bluetooth device (smartphone, tablet, computer), enable Bluetooth and search for available devices.
4. Select "WH-CH400" from the list of detected devices.
5. Once connected, the indicator light will flash blue slowly.
6. The Bluetooth range is approximately 10 meters (33 feet).

3. NFC One-Touch Connection

For NFC-compatible devices, you can establish a connection with a single touch:

1. Ensure NFC is enabled on your smartphone or device.
2. Touch the N-Mark on the left earcup of the headphones to the N-Mark on your NFC-compatible device.
3. Follow any on-screen prompts to complete the connection.

Operating the Headphones

Power On/Off

• To power on: Press and hold the power button until the blue indicator light flashes.
• To power off: Press and hold the power button until the red indicator light flashes and then turns off.

Volume Control

Use the volume buttons located on the earcup to adjust the audio level. Press '+' to increase volume and '-' to decrease volume.

Music Playback

• Play/Pause: Press the multi-function button once.
• Next Track: Press the multi-function button twice quickly.
• Previous Track: Press the multi-function button three times quickly.

Hands-Free Calling

The built-in microphone allows for hands-free phone calls.

• Answer/End Call: Press the multi-function button once.
• Reject Call: Press and hold the multi-function button for approximately 2 seconds.

Voice Assistant

Activate your smartphone's voice assistant (e.g., Google Assistant, Siri) by pressing and holding the multi-function button for approximately 2 seconds when not on a call.

Maintenance

• Cleaning: Wipe the headphones with a soft, dry cloth. Do not use alcohol, benzene, thinners, or other chemical 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

No Power:

Ensure the headphones are charged. Connect them to a power source using the Micro USB cable.

Cannot Pair with Bluetooth Device:

• Ensure the headphones are in pairing mode (indicator flashes blue and red).
• Make sure the Bluetooth function on your device is enabled.
• Place the headphones and your device within 1 meter (3 feet) of each other during pairing.
• If previously paired, try deleting "WH-CH400" from your device's Bluetooth list and re-pairing.

No Sound or Low Volume:

• Check the volume levels on both the headphones and your connected device.
• Ensure the headphones are properly connected to your device via Bluetooth.
• If using an NFC connection, ensure the connection was successful.

Sound Skips or Intermittent Connection:

• Move closer to your connected device to reduce interference.
• Avoid obstacles between the headphones and the device.
• Turn off other wireless devices that may cause interference.

Specifications

Warranty and Support

Your Sony WH-CH400 Wireless Headphones are covered by a manufacturer's warranty. For detailed warranty information, please refer to the warranty card included with your product or visit the official Sony support website. For technical assistance, troubleshooting guides, or to contact customer support, please visit Sony Support.