... Entertainment,Microphone, Amplifier, Loudspeaker,Music play and FM radioSupporting TF card or USB for music ( mp3 format ) ( USB 2. ... ICTEA 2025Output Impedance4 ΩOperation Voltage 9V Recharge Time 6-8 hours Recharger DC9 V / 2000 mA Battery working timekeep ... working in 7-8 hourse Function Mp3, FM radio, Amplifier, loudspeaker, microphone, reverberationColor ...