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. 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. HomeBase 2 Required: The eufy Security Wireless Add-on Video Doorbell requires a HomeBase 2 to operate. Please note, the doorbell alone will not work.