1. Supports USB to RS485/RS232 communication (switched through a toggle switch). 2. Adopting the CH343G chip, plug and play, compatible with for series, for MacOS series, for Linux and other systems. 3. On board ( ient voltage suppression tube) can effectively suppress surge voltage and voltage in the circuit, and prevent and static electricity. 4. The board is equipped with self recovery fuses and protective diodes, which can stable output of current and voltage, prevent overcurrent and overvoltage, and improve impact resistance. 5. Three LED indicator lights on board for easy viewing of power signal mission and reception status. Product type:Industrial grade USB to RS485/232 converter Communication speed:50bps - 1000000bps Host interface:USB Device interface:RS485/RS232 (switched by dial switch) USB interface: Working level: 5V Interface form: USB-A type interface Interface protection: 200MA recovery fuse, ESD static protection mission distance: approximately 5 meters RS485/RS232 interface: Interface form: wiring terminals Interface pins: GND, A+(TXD), B- (RXD) Direction control: Hardware automatically determines and controls the direction of data mission Interface protection: Provides 600W -protection, surge and 15KV static electricity protection (onboard 120R balanced resistor) mission distance: RS485 (approximately 1200 meters), RS232 (approximately 10 meters) under low speed conditions mission mode: point-to-point (up to 32 nodes, with a maximum of 16 nodes.)It is recommended to add a repeater RS232 (only one device can be connected to a point-to-point interface, and if multiple nodes need to be connected, a repeater should be added) Color:Blue Material:plastic Package Contents: 1 * USB to RS485/RS232 Communication Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.