1、FOR CH344L CHIP: Using the original for CH344L chip, high speed telecommunication is stable, reliable, high compatibility; can be extended via USB 4 way isolated RS485 interface, convenient for users to expand access to multiple RS485 industrial serial devices. 2、POWER ISOLATION: Onboard integrated power isolation can provide stable isolation voltage, isolated end without additional power supply; onboard integrated digital isolation, signal isolation, high reliability, strong anti interference, low power consumption. 3、HIGH SAFETY: Onboard TVS (transient voltage suppressor), can effectively suppress the surge voltage and transient spike voltage in the circuit, lightning and static electricity; on board self recovery fuse and guard diode, can ensure stable current and voltage output, prevent overcurrent and overvoltage, improve shock resistance. 4、EASY TO OPERATE: Built in RS485 output terminal 120R resistor, can be enabled by a dip switch, switching flexibility; external 10 LED indicators, easy to view the power supply, device configuration status and signal transceiver status. 5、EASY TO INSTALL: USB to 4 way RS485 converter adopts industrial grade aluminum alloy shell, support wall and rail mounting two kinds of installation, sturdy and beautiful, easy to install.