The Teac MTT-150 Test Tape is a cassette specifically designed for Dolby calibration tone. Produced by the reputable brand TEAC, this cassette comes with a hard case for protection and storage. It is a reliable and high-quality product that is essential for audio professionals looking to calibrate their systems accurately using Dolby technology. The Teac MTT-150 Test Tape ensures consistent and precise audio quality for testing and measurement purposes.