So how does the Halo Rise know when to star tracking? The core of the tracking revolves around a built-in radar sensor and on-chip signal processing. Once a user sits down in front of the Halo Rise for more than a 5-minute period, it begins the sleep tracking session. The device can also tell who the primary user is as long as each person sleeps on their respective sides. So for example, say you typically go to bed later than your partner. Even if they go to bed first, the Halo Rise won’t track their sleep. So long as they’re on the opposite side of the bed from where the device sits. This ensures the correct sleep stage data is being tracked. Which leads to insights the next day to help people reach the overall goal. Which is to improve sleep and wake up feeling more rested and alert.