1. Onboard USB to RS232 interface conversion using CH340 chip.
2. Onboard Power and Status indicator light (Rx & Tx Indicator LED).
3. Onboard recoverable fuse, prevent the output current (prevent from burn the module)
4. Onboard USB male head, convenient to connect the computer.
5. Chip pins already all mainly led ,convenient communication with microcomputer.
6. Board size: 40 (mm) x 20 (mm).
Note : if you using with Windows 7 and up no need driver to install (automatically installed) see picture below :