Bestbuy offers Blink - Outdoor 4 – Wireless smart security camera, two-year battery life, 1080p HD. Sync Module Core included – 5 Cameras - Black for $119.99 (orig. $299.99) with free shipping.

Product Description:
Wireless smart security camera, two-year battery life, 1080p HD day and infrared night live view, two-way talk. Sync Module Core included – 5 camera system

• Fourth Generation
  Outdoor 4 is our fourth-generation wireless smart security camera with up to two-year battery life for around-the-clock peace of mind.
• See and speak from the Blink app
  Experience 1080p HD live view, infrared night vision, and crisp two-way audio.
• Two-year battery life
  Set up yourself in minutes and get up to two years of power with the included AA lithium batteries.
• Enhanced motion detection
  Be alerted to motion faster from your smartphone with dual-zone, enhanced motion detection.
• Person detection
  Get alerts when a person is detected with embedded computer vision (CV) as part of an optional Blink Subscription Plan (sold separately).
• Save and share clips
  Securely store your footage in the cloud with a free 30-day trial of a Blink Subscription Plan. You can also back it up locally with a Sync Module XR and a MicroSD card (up to 256 GB – each sold separately).
• Works with Alexa
  Connect to an Alexa-enabled device to engage live view, arm and disarm your system, and more using your voice.