article_snippet.sent: Instead of relying on cameras, Wall-mounted device uses a sensor to pick out individuals using body heat.
article_snippet.sent: Wall-mounted device also has built in rechargeable batteries and a Wi-Fi connected processor so Wall-mounted device works with a phone app that's used to differentiate between sleepers.
article_snippet.sent: Instead of using cameras, the device uses a sensor to pick out individuals using body heat.
article_snippet.sent: the device also has  built-in rechargeable batteries and a Wi-Fi connected processor so the device can be used with a phone app .