Outdoor amplifier with fm radio with headset mircophone mp3,fm radio,reverberation for sound Used for entertainment, teching Item Name: Outdoor amplifier with fm radioItem No.: GSG-YB002 High ... working time Keep working in 7-8 hours Function Mp3, FM radio, Amplifier, loudspeaker, microphone, reverberationColor ChoiceBlack,Red, BlueWeight 225g ( including battery ...