Trigger by button and/or motion ends photo notification. 2-way audio. Powered from existing doorbell wiring (required). Wide field of view (130 degree). 1080P HD video. Also take pictures right from app. Up to 25 frames per second video. Add your own SD card for up to 6.5 days of continuous recording. Use to automate with other Feit Electric smart products. Turn on lights with motion, No monthly fees required, Easy to install.