The De Opmaat Audio Free system uses advanced wireless technology to transmit audio signals between the transmitter and receiver. This technology is based on the latest developments in wireless communication, including Wi-Fi, Bluetooth, and other proprietary protocols.
The audio is useless on its own. Without the textbook, you have no transcripts, no exercise instructions, and no answer keys. Itβs strictly a supplement, not a standalone listening course. De Opmaat Audio Free