Features: Connect Google Assistant or Alexa - Connect your doorbell with voice assistant for smarter using experience. Support 2-Way Audio - You can use the mobile app to talk to the person who rings the doorbell in real-time. Remote Control on App & Easy Installation - The smart doorbell is easy to connect to the app, compatible with both iOS and Android, via 2.4GHz WiFi, and without wires installing. Clear Night Vision - The built-in IR night vision sensor that automatically switches on when the environment gets dark, providing a clear view at night. Parameters: Item name: Smart Video Doorbell Color: Black, White TF card supported: 8-32G supported(Not included) Battery: 2*18650 lithium battery needed(Not Included) Resolution: 1080P Note: The actual use may be slightly different depending on the specific situation. Package List: 1 * Doorbell