EARLDOM Hands-free Aux Modulator with Dual USB 3.0 A Car Charger, MP3 Player, FM Transmitter, and Smart Phone Charger Features Stereo, FM transmitter, remote control, hands-free, amplifier, built-in speaker, fast charging, APP control, screen display, power off memory, built-in microphone, voice assistant, stereo, car charger, playback, and hi-res functionality Bluetoth FM Transmitter Portable Car Charger Audio: MP3 format Functions: FM transmitter, playback, car charger, and stereo Computer Interface: Supported by Bluetooth Origin Location: Guangdong, China Number of Model: ET-M71 USB Flash Bluetoth Version V5.0 is supported. LCD screen display Two USB ports and one PD port