Wsdcam 4.3inch WiFi Peephole Door Bell Two-way Video Intercom Camera 5000mAh Home Security Video Doorbell Support Alexa Google Specifications: - Power supply: Rechargeable 5000mAh lithium ion battery (built-in), normal use (3-5 times a day) about 30 days standby time.APP real-time reminder, when the battery power is le than 5%, the device will prompt low battery, the low battery APP cannot link the device- Camera Resolution: 2 Million pixels- Camera View Angle: 121 degrees-Display: 4.3 inch TFT color LCD screen- APP: Tuya/smart life- Motion sensor reaction time: low sensitivity, middel sensitivity, high sensitivity optional in APP, high sensitivity about 1 to 3 seconds delay- Photo format: JPG- Video format: (need TF card) or buy cloud service- Memory card: up to 128GB- Motion sensor detect distance about 2 meters- Door thickne: 30-90mm (please measure door thickne before purchase)- Peephole diameter: 17-65mm- Doorbell share: yes- Working Temperature: -20 to 55- Gro weight: about 620g 121 Wide Angle Using 1080P camera 121 wide-angle lens, automatic switching of day/night vision sensitivity (adjustable; distance is about 3-4 meters), TFT color LCD display, suitable for AHD images and videos. 121 Wide Angle, Easily Maximize Your Home Security with a Clear View of Your Doorway. PIR detection Motion detection (PIR motion sensor can automatically detect body movement and trigger push meages and videos (stored to TFT card or mobile phone) within seconds, keeping your home safe 24 hours a day. Two-way intercom brings convenience You can tell the courier where to put the package, or warn strangers, theft, voyeurs, etc. to stay away from your house. No need to open the door or communicate face-to-face, the smart doorbell camera with two-way intercom function can save your family from unneceary danger or accident through the APP. Alexa Google Door Pre Announcement When someone pre door camera, alexa/google devicce will have announcement" Someone at the DEVICE NAME" Battery Capacity and Usage Duration with 5000mAh Battery Built-In ; Battery NOT replaced