Roland Mobile-AC, Acoustic Chorus Battery Amplifier, 5 Watt (2x 2.5 Watt stereo), Microphone input (jack), Instrument input (jack), Stereo input for audio player (mini-jack), Volume of microphone, instrument and audio inputs can be regulated separately, Chorus, Reverb, Wide effect, 15 Hours of battery life (6x AA alkaline), Dimensions (H x W x D): 177 x 280 x 108 mm, Weight: approx. 2.5 kg