To avoid bad buys: This converter can not be more than what a jack socket is designed on a device (PC, tablet, smartphone). One can therefore usually get only audio signals through a loudspeaker unit with plug (z. B. headset). This adapter is designed primarily for the purpose of audio information via a 3.5mm jack socket diverted out a playback device and passed to a speaker device that has a USB connector. One can thus neither information on the device play (z. B. from a USB flash drive) one device to charge a minijack socket. Please also note that there are (with a ring), stereo jack plug are mono jack plug (two rings) and stereo plug with additional functions (three rings, often in smartphones).
