1、For CH343G Chip: The serial communication module adopts CH343G chip, which supports higher communication rate than CH340G, up to 6Mbps; supports more serial port lo levels: 5/3.3V2.5V1.8V 2、Scope of Application: The serial communication module supports for OS X, for Linux, for Android, for Win 7, for 8, for Win 8.1, for Win 10, for Win 11 3、Overvoltage Protection: The USB to UART ttl adapter onboard resettable fuse and TVS diode, onboard 1o protection circuit, anti overcurrent and overvoltage, anti static 4、Convenient and Practical: The USB to UART ttl adapter onboard TTL serial port 3.3V and 5V level conversion pins, can switch TTL communication level 5、3.3V/5V Output: Support output 3.3V/5V, the module is powered by USB, the jumper cover must be jumped to 3.3V/5V. Using double sided black immersion gold process