Crystal-Clear Welcome in 2K FHD: Experience 2K FHD clarity with 4:3 view for clear and detailed visuals of your visitors. Even at night, the crisp images ensure you never miss a detail. Enjoy enhanced performance by upgrading your app to the latest version for a seamless user experience. Real-Time Chat, Seamless Experience: Stay connected with your visitors instantly. When someone rings the doorbell, a pop-up video call appears on your phone. If you're not home, you can set up quick responses and ask visitors to leave voice messages, ensuring you stay informed. - Powered How You Like with Dual Power Options: Enjoy versatile installation options with dual power choices. The quick-release rechargeable 6500mAh battery allows for easy setup and mobility; When wiring, ensure the battery is inserted into the doorbell for proper function. Always turn off the power at the circuit breaker when replacing the battery or installing an SD card (not included).Hardwiring requires a DIY installation.