Enjoy all your favorite tunes even while on the go by taking with you the metal-made brick-shaped wireless speaker. This great speaker can be paired with any of your devices from up to 30 feet away using Bluetooth® 2.1 technology which delivers high quality stereo audio. You can even take high-definition hands-free calls with this speaker as it is equipped with built-in microphone. Each speaker is equipped with a 2000 mAh lithium battery which grants you up to 5 hours of listening time.Note: The use of the Bluetooth® logos and word mark are trademarks that are owned and registered by the Bluetooth SIG, Inc. are all under license.