Best smart plugs 2018: Google, Alexa and Apple HomeKit control Best smart thermostat: Nest, Hive, Tado, Honeywell and more Installation and usability Netatmo smart smoke alarm: Multi-room installation options, WiFi connection, easy installation process, 802.11b/g/n 2.4 GHz WiFi connection Nest Protect: Connects to Nest app, available in battery powered and wired versions, 802.11b/g/n 2.4 GHz WiFi connection Design features Nest Protect: 6-RGB colour light ring including a nightlight, split-spectrum sensors to identify fast and slow burning fires Netatmo smart smoke alarm: Integrated LED light, automatic self-check systems Battery life Netatmo smart smoke alarm: Built-in 10-year battery with self-test functionality Nest Protect: Powered by six long-life AA batteries or wired into the mains Alarm sounds and notifications Netatmo smart smoke alarm: 85dB alarm siren and real-time smartphone alerts, photoelectric smoke sensor Nest Protect: 85dB siren, 2-watt speaker 10-year carbon monoxide sensor, built-in microphone for testing, a humidity sensor to prevent false alarms Smart compatibility Netatmo smart smoke alarm: Works with Apple HomeKit and IFTTT....