Feature: 1. Once someone rings the doorbell, a push notification will be sent to your phone and the picture will be captured and stored in the APP. 2. Connect to the Tuya APP via WiFi to easily complete the setup, compatible with Android and iOS phones. 3. The receiver uses radio frequency to connect the doorbell, with high volume, strong ability to penetrate walls, and wide coverage. 4. Support phone remote communication, even if you are not at home, you can remote communicate with outside visitors through phone. 5. High clear camera supports infrared nightvision, the viewing angle is larger and wider, and the scene in front of the door can be seen more comprehensively. 6. Easy to install and use, powered by 3 * AA battery (not included), with low battery reminder, please replace the battery in time. Specification: Features: Once someone rings the doorbell, a push notification will be sent to your phone and the picture will be captured and stored in the APP. Connect to the Tuya APP via WiFi to easily complete the setup, compatible with Android and iOS phones. The receiver uses radio frequency to connect the doorbell, with high volume, strong ability to penetrate walls, and wide coverage. Support phone remote communication, even if you are not at home, you can remote communicate with outside visitors through phone. High clear camera supports infrared nightvision, the viewing angle is larger and wider, and the scene in front of the door can be seen more comprehensively. Easy to install and use, powered by 3 * AA battery (not included), with low battery reminder, please replace the battery in time. Specifications: Material: Plastics Doorbell Camera-- Resolution: 640 * 480 Rated Voltage: 4.5V Nightvision: Automatic Switching Connectivity: WIFI 2.4GHz, BT Audio: Two-Way Voice Doorbell Power: 3 * AAA Battery(Not Included) Receiver-- Input Power: USB 5V Frequency: 433MHz Working Temperature: 0-45℃ Working Humidity: 10-90%RH Item Size: 87 * 58 * 108mm/ 3.4 * 2.3 * 4.3in Package Size: 200 * 100 * 80mm/ 7.9 * 3.9 * 3.1in Package Weight: 150g/ 5.3oz Packing List: 1 * Doorbell 1 * Receiver 2 * Expansion Tube 4 * Screw 1 * Screwdriver 1 * Adhesive 1 * User Manual Package List: 1 * Doorbell 1 * Receiver 2 * Expansion Tube 4 * Screw 1 * Screwdriver 1 * Adhesive 1 * User Manual