2X Mono MP3 USB Flash Drive Micro SD TF Card Player Decodifica Amplificatore Scheda USA
TF card is the power-on default mode, if TF card is not inserted will play the USB drive. 2Pcs TF Card (MicroSD) and USB Drive (U Disk) MP3 Format Mono Audio Decoder Board Module. “Short Press” TWICE to repeat all of the USB or TF card.