In 1975, Carol has unremittingly pursued sound innovation for going on 45 years. Devoted to the soul of technology. ISO 9001 compliant. 127 patents, and more than 20 awards. Our dedication to bringing science to life has established us as a worldwide industry leader.Carol, the Sound of Excellence. We provide high-quality and reliable products– UHF, 2.4G, Bluetooth, wireless microphone system solutions. Our products are exported to many countries and areas in the USA, Europe, Asia, and the Middle East.