This document summarizes the features and specifications of the PentaClass classroom audio system. It has multiple connection options including Bluetooth, AUX inputs, and a teachers' microphone. It provides 360-degree sound coverage for up to 120 square meters with 50 watts of power. Additional features include audio presets for different modes, a remote control, auto power off, and simple ceiling or wall installation. The system is designed to improve classroom acoustics and allow all students to clearly hear and understand teachers regardless of seating position.