those are just some pop-rivits....i drilled some holes in the little filler panel for the dash installation kit, and stuck them in there....thought it would be cool.....but it isnt anything other than some rivits.....also....i just bought an alarm system $100 |removethispart|@ pep-boys....really simple to hook up....comes with motion detector and power drawl detector too.....nice little addition to the truck.....the screen made my speakers louder...it is 40 watts x4 rms....where most cd players are 50-60x4 watts MAX power..mine is 80 watts x4 max power, and my pre-out for my subwoofer is 6 volt instead of 2.5-4 volt as in most cd player units....definatly worth the money, im gonna have to say this was the next best investment to the lift and tires.....now i can drive anywhere, park and watch movies or play my playstation right in my trucklet.....the night i got it me and the old lady went out 4 wheelin, and i climbed a huge hill, and we chilled for about an hour and a half and watched a movie and chilled back in state land...