Application range: Villa, apartment, hotel, outdoor, factory, office building   The power supply mode: Option 5200mAh (two) batteries; External Micro-USB 5V and AC / DC 12-24V / 1A   Alarm notification. When someone press the doorbell, you will receive a notification that APP pushed   Two Way o. Clearly communicate with visitor in real-time   IP65 Certified for Outdoor / Indoor USE      Clear Night Vision. Provide monitoring in and night   Advanced PIR Motion Detection. When the doorbell detects movement, APP will push notification   Intelligent voice control.   colour: gray   Material: plastic      Package Contents:   1 x Smart Video Doorbell      Only the above package content, other products are not included.   Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.