REMOTE CONTROL - WiFi doorbell camera let's you see, hear and speak to visitors from your cellphone and tablet, Whether you're upstairs or across town
MOTION DETECTION - Get instant alerts when visitors press your wireless video doorbell or motion is detected, You can watch real-time videos on your smartphone
IR NIGHT VISION - Watch over your home at day or night, with infrared night vision from 720p HD doorbell camera
LOW POWER - TWO 18650 batteries can using 6-8 months. no need wire. also support 8-24VA existing hard wire