Portable Amplifier with USB TF FM Min. Order: 5 pcs FOB Price: US $10-13 / ... Terms: L/C, T/T Portable Amplifier with USB TF FM Function: Use for teaching, tour guiding, sales promotion Amplifering ... voice and music Headset microphone USB/TF card FM radio Specification: Output power20WPower supply Li-battery 3.7/ ... 500g KYQ002 Mini size Portable Amplifier with USB TF FM