The general idea behind the Saswell zigbee smart thermostat is to cut back on some of the features found in other devices, such as Nest and the Lyric. These learn the habits of the residents or track the residents through a smartphone app and adapt accordingly. The creators of Saswell zigbee thermostat are going with a more traditional thermostat model, allowing users to control temperatures manually and by a schedule, but without the device actually making assumptions about what they want.
Of course, it's also connected to the internet, allowing users to control the temperature via their smartphone from anywhere there's an internet connection. Saswell zigbee wireless thermostat is also designed as an open system, packing Wi-Fi or ZigBee connectivity and compatibility with smart home systems such as Apple HomeKit. The team also plans to get the device OpenHome Certified.
As for the aesthetics of the device itself, simplicity is the name of the game there, too. It's just a small LED screen that displays the temperature and buttons needed for control. All elements are designed to fade out when not in use, leaving just a simple black or white box on the wall. Additionally, the thermostat mounts to the wall with a magnetic system, making it easy to take down for any reason, such as replacing the four AA batteries – which should only be once every two years. It can also operate continuously if a C-wire is available.