B091XRLF45 Casio, 61-Key Portable Keyboard (CT-S1BK)

61 full-size key with touch response
Stereo Grand Piano plus 60 other AiX-powered tones
Powerful bass-reflex stereo speaker system with surround effect
Class-compliant USB-MIDI connects to free Chordana Play app
Optional WU-BT1 Bluetooth MIDI/Audio Adaper. Optional 6xAA battery power (AC Adapter and music rest included)