... : Teaching waistband amplifier with microphoneItem No.: GS-105Specification:Multifunction all in one with Entertainment,Microphone, Amplifier, Loudspeaker,Music ... supply: rechargeable with high capacity Lithium battery, keep working with 8 hoursOuput power: 12 W, clear and ... in 7-8 hours Function Mp3, FM radio, Amplifier, Line-in, loudspeaker, microphone, reverberationColor ChoiceLight greenWeight ...