mini usb portable speaker for mp3,mp4,phone,notebook,portable speaker,computer speaker mini usb portable speaker for mp3,mp4,phone,notebook,portable speaker,computer speaker Technical parameters Output power: the RMS 3W * 2Faith than: 60 dB noiseSeparating degree: 40 dBRated impedance: 4 ΩPower supply: USB 5V MODEL NO:YH-328COLOR : BLACKQTY: 40 PCSN.W: 15 KGSG.W: 16 KGSMEAS:43.5*30*36.5CM