For a limited time, QVC is offering the Blink XT 4-Pack Wire-Free HD Weatherproof Wi-Fi Camera for only $299.94 (reg. $469.98). You save 36% off the retail price for this security camera system. Plus, this item ships free. This is the best price we have seen online for the 4-pack and is about $20 cheaper than the 3-camera system we saw at Amazon.com. The Blink XT 4-Pack Wire-Free HD Weatherproof Wi-Fi Camera features 720p HD recording, 2.4GHz Wi-Fi, motion/temperature sensors, built-in microphone, night vision, and custom settings. Sales tax is charged in most states. Deal expires July 22, 2018.