The Sierra S8-B Bluetooth Speaker combines high-end stereo sound with portability, letting you enjoy your music wirelessly anywhere you want. Featuring two 40mm, 6-watt (total) drivers and a large speaker cavity for excellent sound, this tiny but powerful speaker can fill any room with rich audio. Bluetooth connectivity allows you to wirelessly play and control your music from Bluetooth devices and take calls hand-free directly through the speaker. A built-in rechargeable battery lasts for up to 10 hours per charge, so you can enjoy your music all day. The Cyren measures approximately 6 x 2.8 x 1.6 inches. Use it at home, take it on vacation, enjoy it while camping, or set it up any other place you want to play your favorite music. The Sierra S8-B pairs instantly with Bluetooth devices like smartphones, Tablets, and computers, letting you send your favorite songs wirelessly to the speaker. The Sierra S8-B has a transmission range of about 33 feet. Features - Bluetooth Technology - Built-in rechargeable battery supports up to 8-10 hours playback (medium volume) - Two 40MM drivers deliver deep and rich sound - Built-in Microphone for Taking Calls - Wirelessly Control Your Music through Bluetooth- 3.5mm line-in jack for wired devices