Yamaha CK88, Stage Keyboard, Velocity-sensitive, weighted 88 GHS keys keyboard, AWM2 & AWM for organ flutes sound generation, 128-Voice polyphony, Integrated effects, Master EQ, 363 voices plus160 Live Set sounds (for splits & layers), Pitch bend and modulation wheel, 9 Organ footage sliders, 3 Part volume sliders, 11 Rotary controllers, Built-in speakers: 2x 6 watts, Battery operation possible (8x AA alkaline or Ni-MH batteries, batteries not included), LC display (128 x 64 dots), Bluetooth connectivity allows audio playback from Bluetooth devices, Dimensions (W x D x H): 1333 x 354 x 148 mm, Weight: 13.1 kg, Includes external power supply unit@+*Connections:*@+@+, 2x 6.3 mm jack line output, 2x 6.3 mm jack line input, 2x 6.3 mm stereo jack stereo headphone output, 2x connection for foot switch or foot controller, MIDI input and output, USB to Device, USB to Host (USB audio interface function, 2 stereo channels from PC to CK, two stereo channels from CK to PC)