eMotion Air: Battery-Powered mmWave Presence Multi-Sensor

Smart home mostly focuses on control — plugs, bulbs, appliances. But without enough sensors, a home can't truly automate; if you still command it by phone or voice, it isn't really smart. LinknLink's eMotion Air is a tiny but powerful multi-sensor: a 24GHz mmWave radar detects human presence accurately (even when you're still, unlike PIR), joined by light and temperature/humidity sensors plus a smart button that binds to devices or scenes. It speaks both Bluetooth and Zigbee — beginners connect straight from a phone, power users add a Bluetooth gateway or Home Assistant. Three common AAA batteries power it for about 1.5 years of normal use; magnetic mounting puts it anywhere, with an optional 90° corner bracket for maximum coverage. Buying these features separately costs $70–$100 — eMotion Air starts at just $9.99. Launched in February 2026, it drew 1,496 backers and about AU$171,938 (roughly $123K), around 313% funded.