Review on 🎧 Enhanced Audio Quality with Plantronics Vista M22 Audio Processor by Alex Panda

Very disappointed with the product. Didn't work with Plantronics Avaya Headset (Plantronics H171 Avaya) Ordered what was recommended for the amp. As I plugged the headset into the amp, my two cats ran out of the room when a very loud high-pitched tone came from the amp. I tried switching the amp to each setting and 3 settings had the same loud sound. I couldn't hear anything from the headset no matter what setting I selected on the amp. I researched online and used the recommended settings but nothing worked. I believe that this product was defective or of very poor quality right out of the box. Very disappointed with the quality and performance.