3. If you pair this to 2 devices, say your phone and a laptop, you have to be careful to disconnect when you go out of range of 1 device. If you do walk away or go on a walk, you will need to power off the headphones then power them back on and connect to the 1 device (out of range of the other device).
https://www.amazon.com/Sennheiser-HD-450BT-Bluetooth-Cancellation/dp/B083W7V3RG

