Thank you for pointing this out. We will be happy to pass this on internally to the responsible department and hope that this will be corrected promptly.

No. Unfortunately not.

These headphones work wirelessly via a Bluetooth connection. To use them wirelessly, activate pairing mode by holding down the power button for 2-5 seconds until the blue light flashes, then connect them to your Bluetooth device, such as a smartphone or computer. For use with an Onkyo amp, if it doesn't have built-in Bluetooth, you'll need an external Bluetooth transmitter plugged into the amp's audio output to transmit sound to the headphones wirelessly. AirPods also require a Bluetooth source, so without a Bluetooth transmitter on the amp they can't be used directly wirelessly. In short, these headphones connect via Bluetooth, and for a non-Bluetooth amp like a classic Onkyo, you need a Bluetooth adapter to use them wirelessly.

The battery life of the Sony WH-CH720N headphones without noise cancelling is not explicitly stated in the sources provided. However, the sources mention that the headphones have up to 35 hours of battery life with Active Noise Cancellation (ANC) switched on. It can be assumed that the runtime could be longer without ANC, but there is no precise indication of this in the available information.

The headphones work with a cable - without you having to switch them on. Simply by plugging in the cable. However, the noise cancelling will not work because all the electronics with the microphones need to be switched on to analyse and filter the ambient noise. If the headphones are switched on, the NC will also work.

The resale price depends on the selling price. Prices can therefore vary there too.

I have separately ordered this case: Auvisio Hardcase Protective Case (Headphone Case) It fits perfectly.

Hi Soeep, WH-CH720N is the more recent one. It was produced in 2023. You can find out more about the technical specifications of both devices on our support page. Sony Europe