Yamaha CK61, Stage Keyboard, 61 Keys, Semi-weighted FSB keyboard, Velocity sensitive, Sound generation: AWM2 and AWM for the Organ Flutes, 128-Fold polyphony, Built-ineffects, Master EQ, 363 Voices plus 160 Live Set sounds (for splits and layers), Pitch bend and modulation wheel, 9 Organ footage sliders, 3 Part volume sliders, 11 Rotary controllers, Built-in speakers (2 x 6 W), Battery operation possible (requires 8 x AA alkaline or Ni-MH batteries, batteries not included), LC display (128 x 64 dots), Bluetooth connectivity allows audio playback from Bluetooth devices, Incl. external power supply unit, Dimensions (W x D x H): 910 x 291 x 109 mm, Weight: 5.6 kg@+@+*Connections:*@+@+, 2 Line outputs: 6.3 mm jack, 2 Line inputs: 6.3 mm jack, 2 Stereo headphone outputs: 6.3 mm stereo jack, 2 Connections for footswitch 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)