Yea they will operate on standard 3.5mm jack but in comparison the Bluetooth is better quality. If you tried the old Bluetooth 2.0 I don’t blame you for hating it. It was horrible but the tech. Has come leaps and bounds and 4.0 is completely different. Hope this helps.
Yes. You can leave the Bluetooth off, and listen via the cord. The cord is supplied but it is very short. You might need to buy an extension cable which would be a 3.5mm stereo male to male. There are a lot of extension cords available on Amazon. Happy listening!