* output power: 3 w
* frequency range: 150 - KHZ (plus or minus 3 db)
* signal-to-noise ratio, or 80 db
* horn specification: 1.77 inches (outside diameter 45 mm)
* impedance: 4 European
* is made of high quality aluminum ndfeb shock film loudspeaker, with good quality;
* multifunctional audio, MP3 / reader/radio, built-in lithium battery;
* support TF card and USB to MP3,
* can through the USB interface to connect the computer, to realize data exchange;
* own audio line can be connected directly mobile phones, MP3, notebook computers, DVD and other source;