BroadLink Smart Motion Sensor, PIR for Home Automation, Works with IFTTT and Alexa Routines. Wireless Trigger Smart Home Devices and Scenes, Occupancy Lighting, Notification, Requires S3 Hub - - Amazon.com
IKEA TRÅDFRI wireless motion sensor 4.4x3.7 cm white | eBay
Ikea STÖTTA LED ceiling/wall lamp, battery operated white - Walmart.com
HomeKit makes Ikea's cheap buttons and motion sensors much more powerful - The Verge
TRÅDFRI Wireless motion sensor, smart white - IKEA