Automatic Recovery Fuse:
Equipped with a 500mA self-resetting fuse, this module offers intelligent overcurrent protection. When current exceeds 500mA, the circuit automatically disconnects to protect your device and USB port. Even in the event of a short circuit, the system remains safe. Once normal conditions return, the connection is automatically restored.

CP2102 USB Interface Chip:
Built with the high-performance CP2102 chip, the module delivers stable and reliable communication at speeds up to 2Mbps.

TTL Level Compatibility & Power Output:
The module supports 3.3V TTL logic and provides selectable output voltages of 3.3V, 4.2V, and 5V—suitable for powering various MCU systems. It also includes DTR/RTS output interfaces, allowing automatic reset during programming for compatible microcontrollers.

Dual-Color LED Indicators:
Features red and blue LEDs to clearly indicate module status. TX and RX LEDs flash during data transmission, providing real-time feedback on communication activity.

3.3V / 4.2V Output Selection Switch:
By default, the V0 port outputs 3.3V. To switch to 4.2V output, simply short the 3V3 and 4V2 pads. The 5V interface delivers a direct 5V output.