The Casio WK-7600 keyboard comes with 50 specially selected built-in drawbar organ tones. Nine sliders can be used to change harmonic overtone level settings and add percussion and click sounds for real-time sound creation as you play. A rotary speaker simulated using a built-in DSP provides the distinctive acoustic effect of drawbar organ speakers. Parameters can be edited to create original "user drawbar organ tones," 50 of which can be stored in memory for later recall. This pack comes with everything you need to get started right away. The Samson HP30 closed back studio headphones feature a comfortable, heavily padded headband and ear cups with 40mm drivers and a frequency range of 20 to 20,000hz. These are loud earphones with an impedance rating of 32 Ohms and a 105 dB / mw sensitivity rating. The keyboard stand is a heavy-duty, single braced, steel, keyboard stand that will hold 49, 61, 76 and 88-key keyboards with a maximum weight of 130 lbs. Secure-Lock height adjustment from 25.25 to 38.75 inches for seated to standing performance positions. Non-Marking rubber end caps. There will be no need for batteries either with the included power supply.