This is an industrial USB to RS232/485/TTL isolated converter with original FT232RL inside. It features embedded protection circuits such as power isolation ADI magnetical isolation and TVS diode etc. What's more the USB TO RS232/485/TTL comes with an aluminium alloy enclosure make it solid and durable to work. ^^ The USB TO RS232/485/TTL is very easy to use fully automatic transceiving without delay. Due to its fast communication stability reliability and safety it is an ideal choice for industrial control equipments and/or applications with high communication requirement. ^^ Fully automatic transceiver circuit with no delay ensures the USB port communicates with different interfaces fastly and stably without interfering each other ^^ Onboard unibody power supply isolation provides stable isolated voltage needs no extra power supply for the isolated terminal ^^ High quality USB-B and RS232 connectors smoothly plug/pull