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: 5/3.3V2.5V1.8VScope 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 11Overvoltage Protection: The USB to UART ttl adapter onboard resettable fuse and TVS diode, onboard 1o protection circuit, anti overcurrent and overvoltage, anti staticConvenient and Practical: The USB to UART ttl adapter onboard TTL serial port 3.3V and 5V conversion pins, can switch TTL communication3.3V/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 processColor: Blackmaterial: plasticPackage Contents:1 x Serial AdapterOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.