Features: 1.Wireless WIFI Connection: Voice intercom doorbell can be monitored and communicated remotely via wireless network without complicated wiring, having connection range up to 20m. 2.Two Way Voice Intercom: Video doorbell built in high sensitivity microphone and speaker, support two way voice intercom, people in different position can realize real time conversation. 3.Night Vision Function: The night vision mode of the wireless doorbell camera switches automatically, and when the light dims, the infrared light automatically turns on to show you high resolution video. You can see it clearly even in dim light. Make sure your home is always safe. 4.Smart Control: Wireless doorbell camera can be controlled by APP, automatic working mode, intelligent and portable in size and weight, easy to install and remove. 5.Durable Material: The wireless WiFi video doorbell is made of durable and reliable material, high strength, waterproof and wear resistant, having long service time. specification:Item Type: Wireless Video Doorbell Material: ABS Plastic Main Control Model: BK7252 Audio Input: Highly Sensitive Microphone AudioOutput: Built In Speaker TF Card: Maximum Support 64GB (Excluding) Battery Type: Built In Lithium Battery 400mAh (Inclusive) PackageList:1 x Video Doorbell 1 x Indoor DingDongMachine 1 xDoorbell Mounting Backboard 1 x Self Adhesive Tape 1 x Charging Cable 1 x Manual