Bought for my father who has bad hearing voices on TV. Connect the supplied optical cable from the TV to the device. A pair of Sony WH1000XM3 Bluetooth headphones are connected to the device. It was pretty easy to set up. There was no lag behind the TV in the headphones. I can adjust the volume by turning the play/pause knob on the base of the device. So far the audio has been pretty good, but I've only tested audio from TV shows, not music. Overall it does the job I wanted. The only drawback of the device is that it does not come with a power adapter. I had a spare USB-C power adapter and USB-C to USB-C cable that I used to power the device.
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