JBL Tour One M3

Yes, both the Smart case and the Smart Tx are synched wirelessly to the headphones and can be used simultaneously.

The True Adaptive Noise Cancelling technology is a features which adjusts noise-cancelling levels in real-time, 50,000 times per second to account for environmental ambient noises and personal attributes such as movement, hair and eyeglasses to deliver best-in-class Noise Cancelling and immersive sound in any environment.  
With the help of Feed Forward and Feed Backward microphones, the Adaptive Noise Cancelling technology fully monitors exterior sounds picking up low-frequencies and neutralizing them before they reach the ear. The headphones generate a sound that's phase-inverted by 180 degrees to the unwanted noise, resulting in the two sounds cancelling each other out. 
In addition, all headphones allow the listener to adapt or adjust the level of ambient noise through features like Ambient Aware and TalkThru.

The built-in Digital-to-Analog Converter (DAC) makes it possible to enjoy lossless high sound quality with low distortion and accurate conversion.

Connect the headphones with the included USB-C cable or 3.5mm aux cable to any audio source to enable Hi-Res audio. If you want to have Hi-Res audio wirelessly you need to connect an Android device with at least Android OS 13 or higher and use streaming sources such as Apple Music, Tidal or Amazon Music.

The way you remove and change the ear cushions on your headphones varies from on-ear headphones to over-ear headphones and also from product to product.

When removing and replacing the ear pads you will see the following examples:

Removing on-ear headphones

Pull the ear cushion as you see on the below picture.

The ear cushion will slide out of the hole when you have pulled it enough, which is the case with the picture below.

When the earpad is completely removed it will look like the picture below.

Removing over-ear headphones

Pull the entire earpad off. You need to pull the material that is placed on your ear. Pull carefully so the plastic hooks does not snap off or break. When you have pulled the earpad of it will look like the picture below.

Replacing new on-ear earpads

Align the cushion with the hole all the way around the ear pads.

Replacing new over-ear earpads

Align the plastic hooks which are marked on the left side on the picture below with the holes that are marked on the right side of the picture.

The JBL Tour One M3 supports SBC, AAC and LDAC 24bit/192kHz when connected to a device that has support for these codec.

JBL Pro Sound is achieved through robust 40mm Mica Dome drivers, which are precisely tuned to deliver deep bass, balanced mids and crystal-clear highs. Each Mica Dome deliver refined high frequencies above 40kHz for the best on-the-go listening experience. Mica is a renewable mineral that can be split into extremely thin elastic plates, making it flexible enough to respond fast and precisely to the electrical signals in headphone drivers.

Spatial sound gives a more natural, realistic and accurate immersive experience whether you are listening to music, movies or games.

The technology processes more details from any stereo content, which generates reflections and reverberation signals. The integrated head tracking means that sound stay fixed in space even when you turn your head, which adds a new layer of realism to your immersive listening.