mini portable usb speaker system with external lit

mini portable usb speaker system with external chargeable lithiumbattery Parameter: 1. Rated Power: 3W+3W2. Frequency Response: 120Hz-18KHz3. Speaker Size: 2″×24. S/N ≥70db5. Li-ion Battery: 3.7V 800mAh6. Material: High plastic quality7. Built-in audio decoding system8. Working Voltage:DC5V Functions: 1,A molding plastic cabinet design, small and lean,and superior sound.2,Enhanced array speaker units, great power, great sound field.3,Spherical diverging playback design,The sound still keep high fidelity for large venues.4,Widely used in learning, leisure, office, morning exercises and other activities of all kinds of daily life and work.5,Used as effective complement for computer/ DVD/MP3/MP5 and other audio products .6,Charged directly, USB-charged and comes with lithium battery three types of power supply.7,High-performance loudspeakers, high-pitched treble, full mediant, deep and rich bass.8,Dual two-unit frequency, fully meet the music play and cinematic effect. Packing: Product weight:250gProduct size: 220(L)*34(W)*72(H)mmColor box:230(L)*51(W)*140(H)mmCarton size:590(L)*480(W)*290(H)mmN.W.:16.5KGG.W.:18.5KGQuantity: 40(Sets)