【TRUE WIRELESS AND EASY INSTALLATION】No wires and cables, just download the APP, then connect it to your doorbell, press the doorbell, you can see, hear and talk to your visitors from anywhere, and through instant Mobile alerts. 【Two-way Audio】Let you talk to your visitors no matter where you are. You can watch live video on your phone. Infrared night vision allows you to take photos and videos at any time, day or night. If you have a doorbell outside your door and want to hear it in the living room, you need a ding-dong machine. It can be hooked up to the doorbell so you can hear it in your living room or bedroom. (excluding Dingdong machine and data cable) 【Low Power Consumption, Long Standby】The video doorbell runs on three 18650 pointed lithium batteries. Using ultra-low power consumption technology, in this mode, the smart doorbell works for more than 6 months and standby time for more than one year. (Tip: After getting the product, please remember to tear off the insulating