HLK-LD2410C Human Presence Sensor 5-12V 24Ghz Millimeter Wave Radar Sensor Module High Sensitivity Non-contact Heartbeat Motion Detection. Enhanced Sensitivity: Detects human motion, static, micro-movements, and body presence. Excellent Environmental Adaptability: Reliable performance in various conditions. Sleek Design with Hidden Installation: Discreet and compact. Flexible Configuration: Customize sensing distance and sensitivity. Versatile Applications: Security systems, smart homes, automation, and more.