1)Mini card speaker for SD card & U disk
2)Wallyson double channel sound
3)Build-out li-on battery
4)Audio input port

Detailed specifications for mini card speaker

Basic functions

* USB Interface
* Support SD card
* Support line in function
* Rechargeable 500mAh li-ion battery
* 3.5MM headphone output interface. wallyson amplifier
* Size: 33*70*174mm, weight: 0.303kgs

Technical specifications

*Output power:3.2W*2RMS
*Speaker unit:1.5*2(antmagnetic)
*Frequency Response:160Hz-20KHz
*Power Voltage: USB,DC 5V/500mAh
*Distortion: ≤0.3 %( 1W 1KHZ)
*Separation:≥75dB
*S/N Rate: ≥82dB
*Accessories: USB cable, audio cable, battery

Optioinal functions

*LCD Display+Temperature
*Radio
*UV coat
*Rubber Oil Cover
*750mAh Battery
*Oil Spray

OEM color and logo print are welcome