Features: 1.66 FEET WIFI RANGE: Smart video doorbell has a 2.4GHz WiFi range of up to 20m (66 feet), which makes it easy to connect to your home network and send a live video feed to your phone. 2.TWO WAY VOICE: Voice intercom doorbell has a built in microphone and speaker with two way voice frequency capabilities to help you talk to visitors or warn strangers more easily. 3.NIGHT VISION MODE: The Wireless voice intercom doorbells' night voice frequency mode automatically switches on when the light dims and the infrared light turns on to show you high resolution video. You can see it clearly even in dim light. 4.APP CONTROL: Video doorbell can be controlled by APP, automatic working mode, IP65 waterproof, powered by rechargeable battery, smart and portable. 5.EASY INSTALLATION: You can install it anywhere you like, just a few minutes, you can easily set the camera on the door in the app and install it on the doorway. specification:Item Type: Video Doorbell Material: ABS Main Control Model: BK7252 Voice Frequency Input: High Sensitivity Microphone Voice Frequency Output: Built in Speaker Battery Type: Visual Doorbell Built in 400mAh Lithium Battery (Included) PackageList: 1 xDoorbell 1 xIndoorDingDong 1 x Self Adhesive 1 x Charging Cable 2 x Screw 2 x Plastic Expansion Tube 1 x User Manual