You can either use one BedJet to heat or cool your entire bed, or two BedJets to have different temperatures per side of the bed.
If you prefer to sleep warm, but your partner prefers to sleep cool (did you know that over 50 percent of couples disagree over sleep temperature), you can bundle two separate BedJets with an accompanying Air Comfort Cloud Sheet (also sold separately).
Honestly, we think the dual is very useful for those who share a bed and like different temperatures, but the single Air Comfort Cloud Sheet is not necessary for a single sleeper.
If you and your partner prefer different temperatures, you can purchase a Dual Zone Climate Comfort System for couples, which is two BedJets for a discount with the Air Comfort Cloud Sheet thrown in, as well, for keeping temperatures separate.