High quality brand new Onboard self-recovery fuse and ESD diode, provides over-current/over-voltage protection, stable and safe operationAdapting all function pins of the chip, more convenient for secondary development and integrationCompatible with popular systems like Win7/8/8.1/10/11, MacOS, Linux, Android...Onboard TXD and RXD indicators for monitoring transceiver statusUSB To UART (TTL) Mini Communication Module, Compact Size, Stable Communication, Over-current/Over-voltage Protection, TTL Serial Converter, USB To TTL Converter. Castellated holes design, compact size, easy to integrate into the device by solderingOnboard original FT232RNL chip, fast communication, stable and reliable, better compatibility. UART communication baudrate: 300bps~3MbpsReserved VCC switching pads on the back, using 3.3V TTL by default, allows switching to 5V by re-soldering