Wireless Microphone Cordless 50 UHF Frequencies Rechargeable Karaoke Stage VocalWireless Microphone Cordless 50 variable UHF Frequencies with Rechargeable Transmitter for Karaoke Vocal or stage. Packed with features you'll love!! Dynamic Cardioid technology for perfect pitch Performance, captures only the sound you want it to, omits and blocks out noise form the sides and rear. 50 UHF variable frequencies with signal isolation and reliable transmission. Consistently clear base performance Feedback rejection for a smooth, non