Features: Original FT4232HL chip, fast communication is stable, reliable Supports USB to 2-way isolated RS232/485+2-way isolated RS232 onboards integrated power isolation Board mounted integrated power isolation, which can provide stable isolation voltages, and the isolation end doesnot require additional power. Board mounted integrated digital isolation Signal isolation, highreliability, strong antiinterferences, low power consumption onboards transients voltages suppression tube), can effectively suppress surges voltages and transients highest voltages in the circuit protections and antistatic Board mounted self recovery fuses and protective ensure stable output of current and voltages, prevent overvoltage and improve impact resistance External 9 LED indicator light for easy views of power and signal transmission status. Industrial metal casing, supporting wall mounted and rail mounted installation , beautiful, and easy installation Specifications: Item：USB to 4CH RS232/485 Modular Chip: Original FT4232HL Size：as Pictures Package Includes: 1Set USB to RS232/485 Modular note: Due to the problem of lighting effects and shootingangles, there is certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.