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As one of its Black Friday ad deals, Best Buy offers the Arlo Pro 2 1080p 4-Camera Wireless Security System for $579.99 with free shipping. That's $32 less than our July mention, the lowest price we could find now by $220, and the best deal we've seen. It comes with four weather-resistant cameras, which also feature night vision and 2-way audio. The Arlo Pro 2 is also compatible with Amazon Alexa. Deal ends November 11.