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pa speaker1.Abundant supply and prompt delivery.2.Easy to handle,built-in BTL stereo amplifier, compatible with different audio device such as laptop, mobile phone,ipod ,MP3,MP4 and CD.It is a perfect match for digital mobile devices. The driver unit is designed professionally,and the sound is pretty good.3.Using computer USB port instead of power adapter for power,it's small and light,easy to carry.4.Color for option:white ,black.5. Power Output: 3W*2 Total Harmony Distortion: <1% Driver Unit: 2 Inch×2 4ΩFrequency Response: 150Hz-20 KHz USB Voltage: 5V (500mA) USB Special Cable: 1000mm Signal Cable: 1000mm Φ3.5mm stereo cable6.Dimension: W92×H86×D80mm.7.Packing details: each set per colorful box(inner box),30 sets per export carton, the size of carton isL520XW410XH305mm.The size of the inner box is L195×W100×H95mm Gross Weight :17.4 kg/30sets8.Payment tems:30% for deposit by T/T before production,the balance should be pay before shipment.9.Delivery details: within 20 working days after receiving the deposit by T/T or the original L/C.If you have any requirement ,please feel free to contact us,we will offer you the best price and service.Looking forward to cooperating with you.Thank you in advance.