This document summarizes a plugin that allows bidirectional communication between a web application and peripherals like scales and barcode scanners. The plugin creates a real-time connection so data can be transmitted and received directly in the web application using HTML tags and JavaScript. It is compatible with Windows operating systems and works with the Bill Redirect software by opening a TCP connection between the two programs. The plugin displays connection and device status and allows selecting target fields in a web page to send data to.