Sony WH-CH510 Operating Instructions

To pair your Sony WH-CH510 with a Bluetooth device, turn on the headphones by holding the power button until you see the indicator flashing. Enable Bluetooth on your device, then select "WH-CH510" from the list of available devices to pair.
First, ensure the USB cable is not damaged and is properly connected to both the headphones and a power source. Try using a different cable if possible. If the issue persists, reset the headphones by pressing and holding the power and volume down buttons for about 10 seconds.
To reset your Sony WH-CH510, turn off the headphones. Then, press and hold the power button and the volume down button simultaneously for about 10 seconds until the indicator light flashes.
Ensure the volume is turned up on both your headphones and the connected device. Make sure the media is playing on the device. If the problem persists, try reconnecting the headphones or resetting them.
No, the Sony WH-CH510 headphones cannot be used while charging. You need to disconnect them from the charger to use them wirelessly.
When you turn on the headphones, the indicator light will flash to show the battery level: three flashes for full, two for medium, and one for low. You can also check the battery level on your connected device's Bluetooth settings.
The Sony WH-CH510 offers up to 35 hours of battery life on a full charge, depending on usage and settings.
Press and hold the play/call button on the headphones to activate your device's voice assistant, such as Siri or Google Assistant. Your connected device must support voice assistant features.
Ensure there are no obstacles between the headphones and the device. Avoid interference from other wireless devices. Try resetting the headphones and reconnecting them to your device.
First, ensure the headphones are charged. If they still won't turn on, try resetting them by holding the power button and volume down button for about 10 seconds. If the issue persists, contact Sony support for assistance.