sam.i.am
Wear black pants and a nice shirt. Nothing fancy, but not torn jeans and stained tshirts - you should look professional. They will probably want to know about any other work experiences you've had, whey you are interested in this job, why you think you would be a good person for the position, what knowledge do you have about electronics, how are your customer service skills. Let them know you are serious about the job and a responsible employee. Good luck & I hope you get the job!