The Nest Cam IQ is Nest's most advanced, most expensive camera yet. It has a 4K sensor, which lets you digitally zoom in on people in your home, a microphone and speaker for two-way chats, and ...

The most common motion sensor we see in cameras is a passive infrared (PIR) sensor, which detects heat (infrared energy) that humans and animals release from their bodies.

Latest Videos From TechRadar Ring Outdoor Camera Plus (White) at Amazon for $99.99 As with most home security cameras, set up is straightforward.