Mini Speaker, Ultra Portable Desk Office Wireless Bluetooth Speakers Built-in Microphone and TF Card Port Works for Ipad, iPhone and Other Bluetooth-Enabled Device (Black) Bluetooth speakers provides rich bass, stereo and clear sound. You might not expect such incredible quality of sound come from a compact speaker. Wireless speakers equipped with microphone Inside of This speaker for hands-free phone calls. The portable Bluetooth speakers equipped with the advanced Bluetooth 4.0 technology, compatible with all Bluetooth-enabled devices (Bluetooth V3.0 and over). Plays up to 30 feet (10 meters) from any Bluetooth-enabled device like smart phone, notebook, tablet PC,TV, and MP3 player. Up to 2.5 hours of playtime, listening to music or making calls, after one single charge.