... one with Entertainment,Microphone, Amplifier, Loudspeaker,Music play and FM radioSupporting USB for music ( mp3 format ) ( USB 2.0/1.1 ... , parade, assembly etc. This mini portable speaker is widely used for Yoga, Gymnastics , office , school , church , factory , hospital ,meeting , restaurant ... , I will recommend you as your request . OEM wireless microphone with USB for teachig, meeting, restaurant