Feature: 1. WITH SIGNAL INDICATOR: With TVS transient suppression protection function to prevent the internal chip from being damaged due to level incompatibility, with receiving and sending lights, resistant to high pulse voltage protection function, and super convenient wiring method 2. OVERVOLTAGE TRANSIENT PROTECTION: Lightning protection, electrostatic discharge protection, surge protection, overvoltage and other transient disturbances caused by power system switches, etc. For these transient disturbances, using protective circuits to protect, bypassing the harmful transient energy to ground 3. 115200BIT ERROR FREE TRANSFER: Completely designed in accordance with industrial grade standards, which has lightning resistant and static shock resistant, limited slope drive, effectively suppresses electromagnetic interference and solves the superposition of valid signals and invalid signals on the transmission circuit. Error free data transfer rate up to 115200bit 4. EFFECTIVE SUPPRESSING EFFECT: On board TVS(transient voltage suppressor), effectively suppressing surge voltage and transient spike voltage in the circuit 5. SUPPORT UP TO 32 TRANSCEIVERS: The receiver has 1/8 unit load input impedance, and up to 32 transceivers can be attached to the bus Specification: Item Type: USB to RS485 Converter Support Baud Rate Range: 75bps-115200bps Signal Reception Indicator: RX, LED Signal Transmission Indicator: TX, LED Driver: Use CH340 driver, compatible with CH340 driver A: RS485 signal positive B: RS485 signal negative GND: Common ground +5V: Positive 5V power output Compatible Operating Systems: For Windows 98SE For Windows ME For Windows 2000 SP4 For Windows XP SP2 and above(32 and 64 bit) For Windows Server 2003 (32 and 64 bit) For Windows Server 2008/2008 R2 (32 and 64 bit) For Windows Vista (32 and 64 bit) For Windows 7 (32 and 64 bit) For Windows 8/8.1(32 and 64bit). Package List: 1 x USB to RS485 Converter