Trying to assemble my system, but am wondering the difference between these two PIDs. http://www.ebay.com/itm/Digital-PID...005&rk=4&rkt=6&mehot=pp&sd=160837787479&rt=nc http://www.ebay.com/itm/Dual-Displa...ffType=OrderSubTotalOffer&_trksid=p5731.m3795 It will be running a 110V(I hope 110 will heat the cabinet enough) element in a 6' commercial Warmer. Aside from this, the Bluetooth alarm notification system, the vents and the smoke generator, is there anything else I should need? Any Bluetooth suggestions? Thanks, Love this site!