Sinyiin CH1715 TTL 8-Channel Serial Port Expansion Module with TX/RX LEDs — 6Mbps, 3.3V/5V Switchable, Multi-OS

Uses CH1715 USB serial bridge (USB driver update required). This TTL expansion module provides eight independent serial channels, each with its own transmit and receive LED indicators for straightforward monitoring of data flow. Supports baud rates up to 6Mbps for high-speed serial communication. Logic level is selectable between 3.3V and 5V to accommodate different target devices. Designed for flexible device management and compatible with multiple operating systems (driver needed).