LCD screen and music stand The sheet music holder can hold sheet music or electronic devices such as ipad mobile phones. The music stand is also removable. Simulated piano keys 61 keys, which consisting of 15 black keys and 46 white keys, the keys are 2.1cm wide and mimic the feel of a standard piano. Built-in Dual Speakers 3W Stereo Speaker X2. The sound quality is more three-dimensional and mellow, so you can get better performance effect. Supports Multiple Devices DC jack, stereo headphone output, microphone input, audio input and output, USB-MIDI, U disk and so on.