Model No.: U2 Supports: iPod, MP3/MP4, Computer, Music mobile, PSP game player, etc Product Features: 1) Portable Hi-Fidelity stereo speaker; 2) Built-in lithium battery, extra battery is not required; 3) Built-in digital amplifier, energy saving; 4) Volume down/up (+/-) adjustable; 5) With storable 3.5mm jack audio cable; 6) Ideal for gifts and promotional items;7) Customized colors and logos are welcome; 8) Compatible with all portable audio devices;9) Portable size for easy carry Technical Parameters: 1) Power output: RMS 2W*2 THD+N1% 2) Frequency response: 50Hz~20KHz 3) Input Voltage: DC 5V 4) Speaker unit:36mm,4Ω 2W 5) SNR: >90db 6) Case material: Pure ABS 7) Dimensions:Φ40 125*95*40mm 8) Weight: 95g        Audio In: Headphone jack (3.5mm) Colour: Black/White/Red/blue/pinkAccessories: Speaker(1pcs) USB line(1pcs) 3.5(mm)jack line Package: carton size:49*39.5*51cm 80pcs/carton 15.1kg/carton We can also print the color box as your design.  Receiving the design file whose format is AI or CDR, we will print a sample for your reference. The mass production will be printed after your confirmation.