Hardware parameters:RS232 female interface General standard:transparent transmission, support IEC62056-21, IEC1107, DLMS, MODBUS and other communication protocols USB & driver:support multiple versions of Windows , for MacOS, Linux and other rate:Communication rate supports 300-19200bps Dimensions: Diameter:32mm Transmitting and receiving distance:6.5mm Type:Infrared Converter Cable Name:RS232 to near-infrared IR converter Installation:25mm * 15mm * 5mm galvanized magnet, magnetic adsorption Environment: Specified working range -25C-70C How to use the product? Just connect RS232 to the handset (-USB) or the DB9 port of the computer. Interface:RS232 female head Features:no external power supply required Remarks:The RS232 interface has a power board, and the output is stable at 5V Occasions of use: computer desktops, workshop calibration Remarks: This must be used when connecting to a desktop computer, because the RS232 interface of the desktop computer cannot output power, and the tooling itself must output 5V power to drive communication Colour:As Shown Material:plastic+metal Size:About 1.5 meters long Package Contents: 1 * infrared converter 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.