Power supplylithium battery aaa battery operation voltagev5 whats in the boxscrew package users manual 3indoor unit 1outdoor unit connectionwireless power w002 materialabs kit configurationone to three doorbell additional featuresintercom non visual doorbell answering modehandheld monitoring timedelay monitoring times005 mountingwall mounting primary applicationelderly pager doorbell home welcome working temperaturec 2050 2050 talk timeh30