Product features:1. PCB size: 26.5mm * 15.6mm2. New chip CP2102 is adopted3. With self recovery fuse, it can effectively protect your downloader and computer USB port in case of accidental short circuit4. With 3 indicators: power indicator, data receiving indicator and data sending indicator, the working state is clear at a glance5. With 3.3V and 5V power output6. Lead out all useful pins7. With reset signal output CP2102 chip has high integration and built-in USB2.0 full speed function controller, USB transceiver, crystal oscillator, EEPROM and asynchronous serial data bus (UART), which supports the full function signal of modem without any external USB device. The working principle of CP2102 is similar to that of other usb-uart transfer circuits. The USB port of PC is virtualized into COM port through the driver to achieve the purpose of expansion.CP2102 chip features:1. USB transceiver is included without external circuit breaker2. It contains clock circuit and does not need external circuit breaker3. Power on reset circuit is included4. The on-chip voltage regulation can output 3.3V voltage5. Comply with USB2 0 specification requirements6. Suspend pin supports USB status suspension7. The asynchronous serial data bus is compatible with all handshake and modulator interface signals8. The supported data formats are data bit 8, stop bit 1, 2 and check bit9. 512 byte receive buffer and 512 byte transmit buffer10. Support hardware or x-on / x-off