Multifunctional portable loudspeaker with sound amplifying and digital music playing function, can be used as MP3 speaker, support TF card and USB disk function | Using high power speaker the sound effect is clear and loud, amplifys your voice and saves your throat | Comes with powerful rechargeable battery, offers you up to 12 hours of using time. | Small and exquisite, amplifier's size:85 x 85 x 33mm (3.3 x 3.3 x 1.3 inch), weight: 225g ,amplification function anytime and anywhere. | Widely used: Teaching, tour guide, sales promotion, lectures, meetings, morning exercise, dance, training and more