Package Included:

1 x?4 Channel Relay Module 5 V

Package Included:

1 x?4 Channel Relay Module 12 V

The USB to TTL Serial Converter Module is a reliable interface board for connecting computers with microcontrollers and TTL-based devices for programming, debugging, and serial communication. It supports 3.3V and 5V logic levels and features a Micro USB interface, pin header output, and accessible IC pins for flexible connections. Built-in TX/RX LEDs indicate data activity, while a 500mA fuse provides added USB port protection. Ideal for Arduino, embedded systems, GSM/GPS modules, sensors, robotics, firmware flashing, and electronics prototyping.