Blink Outdoor XR+ with Free Battery Doorbell 2K+ — Extended range wireless Outdoor 4 camera and 2K battery doorbell. Sync Module XR+ included — 6 camera system + doorbell

From Amazon

• Up to 10x beyond Wi-Fi range — Place Outdoor 4 cameras (sold separately) up to 800 ft away from your Sync Module XR+ with some trees or structures in the way, or up to 2,700 ft with a clear line of sight. Range will vary based on obstructions and interference; resolution reduced at longer ranges.
• Maximize range — Place Sync Module XR+ outdoors, 9ft or higher, and line of sight to cameras with the Blink Weather-Resistant Power Adapter (sold separately).
• Faster live view where wifi is spotty — XR technology runs on the 900MHz band, avoiding typical wifi congestion, and unlocking up to 20% quicker access to live view in areas where your wifi signal is poor.
• Experience a more reliable connection — Cameras using XR technology have up to 70% fewer disconnects in areas with poor wifi signal strength.
• Get two-year battery life for Outdoor 4, even at long range — Blink's patented chip technology unlocks up to two years of battery life when used with a Sync Module XR+ and Energizer Lithium AA batteries (both included).