Think smartphones, notebooks, and tablets—that can receive and share Bluetooth signals from such accessories as speakers, headphones, fitness accessories, and even medical tools such as heart-rate monitors and electronic thermometers.
But never fear! Newer laptops, phones, and slates with Bluetooth Smart Ready radios built in will work with previous-generation Bluetooth peripherals. Essentially, if you have a Bluetooth Smart Ready smartphone or notebook, you can still use it to stream podcasts to your Bluetooth 3.0 wireless speaker system or headphones. So no need to throw out those headsets or portable speakers.