Unitek Portable Bluetooth Speaker, Aluminum Wireless Bluetooth Speaker V4.0 with Micro SD Slot, FM Radio & Built-in Mic for Speakerphone Function (Black) The portable bluetooth speaker plays at distances up to 30 feet (10 meters) away from any Bluetooth-enabled device such as your smartphone, notebook, tablet, mp3 player and more. Premium Rose Gold Aluminum Unibody Housing with Bluetooth 4.0 chipset, the wireless bluetooth speaker is compatible with all Bluetooth-enabled devices. Built-in Rechargeable 600mAh Lithium-Ion battery, the portable bluetooth speaker supports up to 5 hours playback time. Built-in Microphone allows you to answer calls hands-free without delay. Auto-Scan FM Radio capability. Simply use the included Micro USB cable to act as an antenna. 3W dynamic stereo speaker with Enhanced Bass. Micro SD (TF) Reader Slot supports playback of MP3 files. Box Contents: 1 x Unitek Portable Bluetooth Speaker V4.0, 1 x micro USB Cable, 1 x User Manual, 2-Year Warranty & Quality Guarantee, 24-Hour Friendly Customer Service & E-mail Support.