Nady WA-120BT HT Wireless Portable compact P.A full-range speaker system with built-in amplifier, BLUETOOTH, mp3 player, mixer, handheld wireless microphone with rechargeable battery Powerful 20W maximum audio power output with Built-in echo/reverb and included WHT-BT Handheld Microphone Wireless system features noise-reduction companding circuitry for quietest operation with a wide dynamic range. Built-in bluetooth / USB / micro SD card mp3 player 1/4 unbalanced input jacks (1 MIC, 1 AUX) and one 1/4 unbalanced RECORD OUT, volume, treble and bass and echo/reverb controls This is a single fixed-frequency wireless system. Please consult the manufacturer to confirm compatibility when attempting to use two or more of this system simultaneously or use it with other wireless systems.