Features: Adopts FT4232HL chip, fast communicating, stable and reliable, better compatibility. Supports USB to 4-ch isolated RS232, convenient for expanding multiple RS232 industrial serial devices. Onboard unibody power supply isolation, provides stable isolated voltage. Onboard unibody digital isolation, allows signal isolation, high reliability, strong anti-interference, low power consumption. Onboard TVS (Transient Voltage Suppressor), effectively suppress surge voltage and transient spike voltage in the circuit, lightningproof & ESD protection. Onboard self-recovery fuse and protection diodes, ensure the current/voltage stable outputs, provide over-current/over-voltage proof, improve shock proof performance. Onboard power supply screw terminal, allows 5V~36V DC wide range input. 9 LEDs for indicating the power and transceiver status, Aluminum alloy enclosure with sand blasting and anodic oxidation, solid and durable. Specifications: HOST PORT: USB DEVICE PORT: RS232 BAUD RATE: 300bps ~ 921600bps OPERATING SYSTEM: forMacOS,Linux,Android,Windows 11/10/8.1/8/7 USB interface: Operating voltage: 5V Connector: USB-B Protection: 200mA self-recovery fuse, isolated output Transmission distance: about 5m POWER SUPPLY INTERFACE: Power supply: 5~36V DC screw terminal Protection: Anti-reverse ISOLATED RS232: Protection: TVS diode, surge protection & ESD protection, power isolation and signal isolation Transmission mode: Point-to-point Transmission distance: about 15m INDICATORS: PWR: Red power indicator, lights up when there is USB connection and voltage is detected TXD1~4: Green TX indicator, blinking when the RS232 port is sending data RXD1~4: Blue RX indicator, blinking when the RS232 port is receiving data Temperature range: -40℃ ~ 85℃<br