Description Keyboard MQ-811USB
  – on / off power button,
– music keyboard (36 white keys + 25 black keys),
– digital display,
– 16-tone actuators (eg piano, cello, jazz guitar, trumpet, saxophone, flute, oboe …),
– buttons that activate 10 rhythms (eg waltz, funk, ballad, disco, jazz …),
– buttons that activate the drums,
– demo button (6 melodies),
– control buttons / MP3 volume,
– volume control buttons,
– tempo adjustment buttons,
– start / stop button,
– recording button,
– programming button,
– S.E / PLAY button,
– Microphone output
– USB port,
– loudspeaker
– microphone
– Power Supply.
POWER SUPPLY OF THE INSTRUMENT (exchangeable):
1. through the network – power supply attached to the keyboard,
2. four AA 1.5V batteries (ordinary sticks) – not included.      
Set contains  
  – keyboard,
– microphone
– Power Supply.    
Dimensions  
– length about 53.5 cm,
– width approx. 16 cm,
– height approx. 5 cm.