King-size Eight Sleep dual-zone mattress topper. It connects through Wi-Fi to an app that monitors each night's slumber quality and lets you select separate warming temperatures for each side of the bed. The alarm feature on this Eight Sleep dual-zone mattress topper can wake you up during your lightest sleep cycle.

Item is pre owned and was used for only a few months. I have cleaned it with Lysol and febreeze and it is in like new condition. Works excellent! We’re parents of 2 under 4, so we don’t really need this much technology to tell us we’re not sleeping much.

Retails for over $400 and you do not need an Eight mattress for it to work. Will work on any King mattress.