1、[Versatile Use] This 232 to TTL module is compatible with devices operating at 3V to 5.5V. Includes SP3232 (232 transceiver) and DB9 connector for PC and MCU connection. 2、[LED Indicator Lights] D1: RXD LED flashes green when receiving TTL data. D2: TXD LED flashes green when sending TTL data. D3: POWER LED remains on when powered on. 3、[ESD Guard] The 232 board features ESD guard function, preventing damage caused by electrostatic discharge, ensuring service life. 4、[SP3232 Chip] The 232 to TTL serial port module uses SP3232 chip, and supports hardware flowrate control. With compact layout and small space occupation. 5、[Premium Materials] The 232 TTL module adopts premium PCB board and components, ensuring durability and reliability. Item Type: 232 to TTL Module Material: PCB Voltage: 3-5.5V Chip: SP3232 Interface: DB9/UART 1 x 232 to TTL Module 1 x Jump Wire