... micrphone 3,USB/TF card ,FM Radio 4,Mini size,Easy to take 5.Reverb /Echo function ... waistband teaching tour guide speaker with Reverb/EchoFeatures*Mini size,easy to take*18W output power, sound ... microphone x 1set*14650 Lithium battary x 2pcs*Audio cable x 1pc*Hanging belt x 1pc Applications ... , Speech,Publication,Outdoor entertainment 2012 Belt Portable Mini Audio Amplifier Speaker with Reverb/Echo V-3