FM radio/mp3 player waistband loudspeaker with reverberation of sound with headset ... in one with Entertainment,Microphone, Amplifier, Loudspeaker,Music play and FM radioSupporting TF card or USB for music ( mp3 format ) ( USB ... hours Recharger DC 9 V/ 2000 mA Battery working time Keep working in 7-8 hours Function Mp3, FM radio, Amplifier, loudspeaker, microphone ...