KH Portable Karaoke Sound Echo Mixer System MachineSet Compatible with 2 Microphone 4 W AV Control Amplifier  (Black)

A combo of a portable amplifier with mic that can be connected wirelessly via UHF technology (better than Bluetooth Voice Amplifier) offers stable connection and better flexibility of movement in a classroom. Wired voice amplifier for teacher is a huge hit already, and this wireless amplifier mic system is an upgrade to existing wires loudspeaker with microphone ? get wireless, with same excellent amplification & natural sound. This classroom speaker mike for teacher is ideal for people who have to regularly communicate with echo sound.