Suitable for all smart phones, such as iPhone, Samsung, Nokia, HTC, OPPO and other cell phones with Bluetooth function; Only audio output, voice call is not transferred to the music player; HD decoding technology, more fidelity sound; Upgrade your wired speaker into a wireless Bluetooth speaker right now; Also for car speaker without Bluetooth function, only connect with this Bluetooth receiver for wireless music play (car audio device needs to have AUX IN interface).