Enjoy all of your favorite tunes whether you are in the office, at home, or outdoors by having with you the brick-shaped wireless speaker. This speaker, which sports a brick-like design, can pair with your devices from up to 30 feet away as it is equipped with Bluetooth® 2.1 technology. Even better, you can take hands-free calls with this speaker with its built-in microphone. Expect around 3 to 5 hours of listening time with this stereo speakers' included rechargeable 500 mAh battery.Note: The use of the Bluetooth® logos and word mark that are trademarks registered and owned by the Bluetooth SIG, Inc. are all under license.