... pirce! Portable Microphone for teachers,meeting,restaurant,etc Multifunction all in one with Entertainment,Microphone, Amplifier, Loudspeaker,Music play and FM ... Recharge Time 4-6 hours Battery working time keep working in 8-12 hourse Function Mp3, FM radio, Amplifier, loudspeaker, microphone ... your request . Lower price! Wireless Portable microphone for teachers from China Tunersys in 2012