Wireless Bluetooth speakers work with nearly all smartphones (Android, Windows Phone, BlackBerry) and many Android tablets, as well as all iPhones, iPads, and all iPod Touch models (except for the first-gen Touch).
Audio fidelity is often a step down from the non-Bluetooth options like AirPlay speakers -- but a lot of people can't hear the difference, and the quality of Bluetooth speakers has improved in recent years. Note that many Bluetooth speakers are designed with rechargeable batteries, so they can be moved from room to room with ease. Some include speakerphone functionality as well. You'll find our current top Bluetooth picks below.
If you're looking for something else, you can also check out our list of the best speakers overall.