Quick Details Brand Name: H.T. Model Number: V-150D25 Style: Handheld Microphone Communication: Wireless Use: Karaoke Microphone, SINGING, Trolley audio Place of Origin: Guangdong, China Function: Light-weight Polar Pattern: Cardioid Product name: Wireless Mic operating voltage: 21.5V BARRERIES working current: < 90Ma Frequency Response: 40Hz-15KHz Dynamic range: >105dB Spurious suppression: >80dB Image suppression: >80dB Sensitivity: 5dBuv