eufy Security eufyCam S3 Pro 4-Cam Kit $640

Amazon has the eufy S3 Pro 4-Cam Kit for $640.

Nighttime That's as Bright as Day: Harness the power of a 4K camera combined with MaxColor Vision technology. eufyCam S3 Pro captures exceptionally detailed surveillance footage in every frame, offering day-like image clarity even in ultra-low light conditions without the need for a spotlight.
Reliable Solar Power System: Experience peace of mind year-round with continuous, reliable security powered by SolarPlus 2.0 technology. Choose the built-in panel for streamlined efficiency or add an external panel to expand energy coverage. This system offers versatile mounting options and reliable backup power for continuous security.(includes 2 backup solar panel).
Radar-Powered Detection Alerts Only What Matters: The dual motion detection system, combining radar and passive infrared (PIR), accurately identifies human movement and reduces false alerts by 99%, guaranteeing that alerts are only triggered by major security events in specified areas.
Local Security, No Monthly Fee: 16GB of on-device storage and up to 16TB of expandable storage without monthly fees, HomeBase S380 equips your devices with self-learning AI for intelligent management and facilitates effortless control over group settings, keeps your privacy securely in your hands.
Compatible with HomeKit, Alexa, and other voice assistant. (The video footage will be 1080P resolution when using HomeKit. Update Homebase 3 to version 3.5.8.9 or higher, and ensure the latest eufy app is installed. )

$640