Experience unparalleled 2K FHD visual clarity with the eufy Video Doorbell C31. View visitors in stunning detail, day or night with an expansive 4:3 view covers the entire front door area. Receive instant video calls on your mobile phone when guests ring the doorbell, allowing you to provide instructions to delivery drivers or greet visitors even when you're in another part of the home. You can also set up quick responses or request visitors to leave a voice message. Enjoy flexible installation with dual power options: a quick-release rechargeable 6500mAh battery for fast setup and mobility. Or hardwire the doorbell to your home’s existing wiring for continuous power and all-day recording. Get enhanced visibility from the doorbells' camera, which records 5 seconds before motion is detected for added visibility of activities around your home.