Dual high definition speaker drive units, 2.0 Two-Channel 360 degree surround super bass and stereo sound effect, feel the shocking bass of the music. Bluetooth 4.0 chipset, powerful audio decoding, stable bluetooth signal transmission, operating distance up to 10 meters ( free space ), Superior Compatibility, works with all the bluetooth enabled electronic devices such as smartphone, smart tv, notebook, MP3, etc. Zealot Exclusive APP built-in hundards of cloud radio stations including Variety Shows, Online Music, News, Sports Channel, etc. The APP Also Has Pedometer function. 2400mAh Super big capacity battery, extremely long standby and using time, the talk time / playback time up to 12 hours. Built-in sensitive HD microphone, handsfree support to answer incoming phone calls even when it play music or when you’re driving, it’s very convenient. built-in Micro-SD Card Slot and Flash Drive Slot, Support TF Card / Flash Drive Play Mode, Even You Do Not Own A Device With Bluetooth Function, You Can Also Insert A TF Card With Songs Downloaded To Play Music . Support AUX Line-out Music Play Mode, You Can USe A Standard 3.5mm Audio Cable Connect The Speaker To Mobile Phone Or Tablet PC To Play Music.