Harmon Aluminium Wow Wow Trombone Mute String Winders it has a bidirectional side

it has a bidirectional side mic for capturing sounds from the left and right

Circumaural design contours around the ears for excellent sound isolation in loud environments

Rack mount brackets included

The pickup’s minimalist construction lessens any influence on the acoustic properties and creates an intimate coupling between the pickup and guitar for the highest fidelity possible

Power Amp valves: 1x ECC83

Harmon Aluminium Wow Wow Trombone Mute String Winders it has a bidirectional sideThe original Harmon Wow Wow mute for trombone! Creates that classic Harmon buzz with a unique Harmon sound. Key Features: Aluminium Wah wah sound For trombone