Feature: 1. Long Endurance: The built in lithium ion battery of this video doorbell camera ensures long standby time without frequent charging. And the ding dong machine uses USB power, making it easy to use. 2. 2 Way Video Intercom: When someone rings the doorbell, the wireless video doorbell camera sends a notification to your phone, allowing you to enter the mobile video call interface. With the built in microphone, you can view and talk to visitors anytime, anywhere. 3. Easy Installation: The WIFI video doorbell camera supports adhesive installation and drilling installation. No need for power supply, convenient and worry free to save your time and effort. 4. Screen Shot: Can record visitor images when the doorbell is pressed and save recordings to the cloud for enhanced safety. The mobile app can view past images at any time, providing a safer experience. 5. Wireless Connection:The wireless remote video doorbell supports 2.4G WiFi and APP connection, 480P high resolution for clearer images and videos, capturing more details. Specification: Item Type: Wireless Visual Doorbell Material: ABS Battery: Built in 800mAh lithium battery for doorbell camera (shipped with built in battery) Features: Voice system, 2 way intercom, Remote viewing on mobile APP after pressing the doorbell Maximum Resolution: VGA, 640 x 480 Video Encoding Standard: MJEPG Audio Encoding Standard: G711.A Video Frame Rate: VGA at 20fps Day Night Mode Switching: Automatic Video Transmission Encryption: AES. Package List: 1 x Video Doorbell1 x Indoor Ding Dong Machine1 x Mounting Base1 x Double Sided Adhesive Tape1 x Chinese English User Manual