Refer the user manual below for troubleshooting</br>Big sound: Precision drivers for superior bass</br>Completely wireless: Bluetooth functionality up to 30 feet?? without the hassle of cords</br>Rechargeable: Party for up to 11 hours without the hassle of cords</br>Speakerphone: Integrated speakerphone for hands-free talking</br></br>Product Description</br></br>Jam Transit Wireless Headphones feature Bluetooth wireless functionality works up to 30 feet?? with speakerphone mode to switch from music to calls. Works with your Apple iPhone?? iPad?? Google Android?? or other Bluetooth enabled smart phone or electronics. Precision drivers give you superior bass and a big sound?? without the hassle of cords. Rechargeable battery for up to 6 hours of playtime.</br>