Authentic FT4232HL chip powers four isolated RS232 channels with DB9 male connectors, delivering speed, stable, reliable communication and broad compatibility with various systems. Four isolated RS232 interfaces can be extended via USB, enabling convenient access to multiple RS232 industrial serial devices from a single host. Wide system compatibility: works with Mac, Linux, Android, Windows 11, Windows 10, Windows 8.1, Windows 8, Windows 7, and other operating systems. Onboard power isolation: provides stable isolation voltage to enhance signal integrity and protect devices; digital isolation offers reliability, strong antiinterference, and low power consumption. Surge and ESD protection: onboard TVS diode suppresses surge voltages and transient spikes, providing antistatic protection. Includes an onboard terminal extra power supply interface that supports 5 to 36 V DC widevoltage input. Protective circuitry: onboard selfrecovery fuses and protection diodes ensure stable current and voltage output, prevent overcurrent and overvoltage, and improve shock resistance. Use scenarios: Industrial automation: connect multiple RS232 devices to a single host via USB while maintaining isolation for robust operation. Data logging and testing: capture data from several RS232 sensors or instruments on a PC, Raspberry Pi, or industrial controller. Lab and development benches: build test setups that require reliable, isolated RS232 communication across multiple devices. Key attributes: FT4232HL based design, four isolated RS232 channels, DB9 male interfaces, USB extension, 5–36 V DC widevoltage input, builtin isolation and protection features, broad OS compatibility.