Easy to use: Unlike other ESP01 programmer, this one has a little rocker switch on the side which is very handy ESP-01 serial wifi module can be directly plugged into the yellow pin header without any connection wires Baud Rate: 115200, Selectable working mode: On-board toggle switch. UART side for serial TTL debugging by AT commands, PROG for firmware programming USB to serial TTL chip: CH340G, please install driver before use it What you will get: 2PCS USB to ESP-01 Adapter