DUAL FREQUENCY CHANNEL: 1 wireless Digital microphone Plus Headset Mic Set system by Boytone has dual fixed frequency channel and broad audio response range with low distortion so you can enjoy cordless singing to karaoke music and mobility for energetic on stage performance, Microphones provide up to 15 hours of wireless operation on a 4 AA alkaline battery included. CLEAR SOUND & STABLE SIGNAL: Each microphone operates on a single separate channel in the high-band UHF range for reliable, this professional portable wireless microphone set has a channel frequency range of 520~556MHz and high signal over noise ratio performance for capturing high quality audio. Ideal for professional engagement, conference INDEPENDENT MICROPHONE: Each dynamic mic features its own Mute, off & on power for a karaoke experience that both kids and adults will enjoy. Perfect for PA, karaoke, DJ party, conference. Each microphone operates on a single separate channel in the high-band UHF range for reliable,