Features: Brand new and high quality Adopt original FT4232HL chip, faster communicating, stable and reliable, better compatibility. Onboards unibody power supply isolation, provides stable isolated voltaged, needs no power supply for the isolated terminalsl.Onboards unibody digital isolation, allows signal isolation, high reliability, strong anti-interference, low power consumption. Multiple Protections, Safe And Stable--- Onboards TVS (Transient Voltaged Suppressor), effectively suppress voltaged and transient spikes voltaged in the circuit, lightningproof protections. Onboards self-recovery protections, ensures the current/voltaged stable outputs, provides over-current/over-voltaged proof, improves shock resistance. Industrial grade metal material, supports wall-mount and rail-mount installations, solid and beautiful, easy to install. Specifications: Material:Aluminium Alloy USB interface: Working level: 5V Interface form: USB-B type interface RS232 interface: Interface form: DB9 male Interface protection: TVS tube protection electrostatic protection Transmission mode: point-to-point TTL (UART): Operating voltaged: 3.3V/5V Protection: clamp protection diode, over-voltage/negative-voltage proof, shock resistance Transmission mode: point-to-point Size:Approx.86.5x71.6mm/3.4x2.8inch Package Includes: 1x USB to RS232/485/422/TTL Converter note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.