This Bluetooth speaker is stable in signal transmission, powerful audio decoding, operating distance for some meters, Superior Compatibility, works with all the Bluetooth enabled electronic devices including smartphone, notebook, MP3, etc.Integrated with multi functional control panel, songs switch, play mode switch, volume control, play / pause High definition speaker drive units, Channel degree surround powerful bass and stereo HiFi sound effect.AUX Line-in Play Mode, USe a Standard Audio Cable to Connect The Speaker To Mobile Phone Or Tablet PC To Play Music even when your devices without Bluetooth function, can be used as a wired speaker.5. TF Card Play Mode, Insert A TF Card With Downloaded Songs To Play Music, support MP3 / WMA format songs.Built-in Super big capacity lithium battery, extremely long standby and using time, the talk time / playback time for longer hours.The speaker with USB Charging Port, the strong battery can be used as a power bank to charge the mobile phone.Support Handsfree Talk, built-in sensitive HD microphone, handsfree support to answer incoming phone calls even when it play music or when you're driving