Voice Changer, 2 Way Intercom: The video doorbell camera built in microphone and speaker, you can make a real time video call to anyone in front of the camera in any situation. Ideal gift choice for the elderly, kids and women living alone. 1080P HD Video and IR Night Vision: Video doorbell camera can clearly see your house with Full HD 1920x1080 pixel, IR night vision with a range of up to 33 ft. It provides clear visibility even in complete darkness, the doorbell can your home from day to night. PIR Motion Detection and Real Time Alert: doorbell camera built in PIR sensor allows you to receive real time alerts and push notifications when detects human motion. 5 level sensitivity adjustment and customizable areas can reduce unnecessary interruptions and focus only on important matters. 2.4 Connection: High speed network connection, supports 2 way voice calls with noise cancellation, supports waking up the device via mobile phone within 1s. Long Battery Life: Built in 4000mAh high