Adjust way:master volume, the bass volume, high volume knob.
Fm,bluetooth.
Interface: external input.Usb,sd card,
remote control. Easy to Operate As well.
frequency response:40-20khz.
Power output(rms):90 watt
voltage ac 220-240v,50/60hz
vizio ht-103 multimedia speaker system cable combination loudspeaker bass music subwoofer mobile phone laptop black
on/off power switch
usb & sd input (mp3 player)
three small speaker
impedance: 8 ohms
total output power: 45w
360 degree surround music.