Furthermore, there’s also a heat sensor so you’ll get notified when the home gets either too cold or too hot, a humidity sensor so it makes it unlikely that the alarm will be triggered when there’s lots of steam, an ambient light sensor so the detector knows when the lights are shut off and it can activate the Pathlight feature or the Nightly Promise – the LED will be green if everything is fine, otherwise, it will become yellow and an occupancy sensor it is used with the Pathlight feature, so it will detect movement and will shine a light on your path during the night – so you don’t stumble on the furniture. With the new released WiFi systems and home automation hubs, I noticed an increased interest towards simplicity and minimalism in both design and functionality, which meant a simple design and a single LED which showed the status of the system with different colours. Of course, for me it did not make much sense since there is no intuitive way to understand all those flashing or solid colours, so I said that a voice feedback would make much more sense. It seems that Nest Protect actually implemented such a system and, using an omnidirectional microphone, it will speak to you in words besides also using the appropriate colours: there are two types of alerts, the Heads up it’s a calmly spoken warning + yellow LED, when smoke or CO levels are rising but have not yet reached dangerous levels and the Emergency Alerts when smoke or CO are at dangerous levels, the Nest Protect notifies you where is the problem, it turns the LED red and triggers the loud sound alarm – 85dB. Head Up and Emergency alerts can be silenced by pressing the circular button. Note: This device is not intended for people with hearing problems it lacks a flashing strobe of light and the 85db alarm may not be enough in such cases. The Nest Protect runs self tests regularly every 200 seconds to see the status of the batteries and sensors and you can also run a full test to check at any time during this process, you’ll notice a blue light rotating around the button. If you have more than one Nest Protect detectors, you can interconnect them wirelessly the device supports the 802. 11b/g/n standard and Bluetooth Low Energy technology and, in case of an emergency, all the devices will speak at once telling you the location of the triggered alarm the devices shouldn’t be more than 50 feet apart from each other. The wired and battery models can be connected wirelessly up to 18 and you can also connect the Nest Protect with other Nest smart products such as the Nest Learning thermostat. Now, let’s talk about the elephant in the room or the Nest!: the security and privacy of your data.