The stereo speaker connect over Bluetooth in seconds to electronic devices which support Bluetooth connection and non-Bluetooth devices can be connected with 3.5mm audio cable connected to the AUX-IN jack. The built-in MIC for handsfree speakerphone from Smartphones and iPhones. Max connect range of this speaker with Bluetooth is 10 meters, enough for daily music listening. High capacity rechargeable 800 mAh lithium battery for up to 4 hours of playtime when fully charged. Suppot TF Card to read and stored music files, you carry the multimedie library. The special anti-slip base is great design to place the speaker everywhere. Color：Gold, Rose Gold, Magenta, Black, Silver Size：3.34"x1.45"