CAROL Back Air Chamber Handling Noise Cancelling Vocal Microphone_BC Sereis Using CAROL next generation technology "Back Air Chamber Handling Noise Cancelling" to reduce 50~300Hz low frequency vibrating noises. This series' microphones can deliver the best sound for every scenario. This high-class dynamic microphone sonorous low frequency and rich mid-range well. With durable zinc alloy body in elegant curvy style design, it conforms to ergonomics for a comfortable grip. CAROL BC series obviously enhance the live performance with pure and touching sound, also as an ideal selection for home entertainment, karaoke, lecture and meeting.