2.5x the Clarity: The built-in Sony 2K sensor and professional-grade lens allow you to view activity in picture-perfect resolution. See visitors in sharp detail as they approach your door No Monthly Fee: Designed to protect your home as well as your wallet, eufy Security products are one-time purchases that combine security with convenience. All your data is stored locally meaning you will never have to pay for cloud storage Dual Power Options: Half a year of coverage from one charge or non-stop power supply via a wired connection Expanded Field of View: The increased 4:3 Aspect Ratio ensures you get a head-to-toe view of anyone who approaches and gives you the perfect viewing angle every time Next-Level Detection: Have total control over what is detected through the use of the motion sensor, smart human detection, and activity zones. Receive real-time alerts when anyone approaches so that you never miss a delivery or keep guests waiting eufy Security Video Doorbell (Battery-Powered)Fr