A:AnswerAccording to the manual and reputable online sources, it absolutely does have a headphone jack. The manual illustrates it has two that use a "stereo standard plug". Headphone output is one of the primary features of practically all digital keyboards and this keyboard supports two players at one time. The instruction manual gives directions for attaching external audio equipment through the headphone jacks.
A:AnswerYou tube model number and there’s a how to video on how to put it together literally took me 30 minutes with video and probably even less than that. It made it so simple!
A:Answerit does not come assembled. There is a Youtube video on how to assemble Casio PX 770. it only requires a screwdriver and a box cutter to assemble.
A:Answeryes, you can definitely connect a headphone, and it require the bigger headphone jack(I do not know the size number, but it seems like most keyboards use the same headphone jack).