1080P HD Video Doorbell camera, 4.3 inch display screen. Built-in 5000mAh rechargeable battery, with low battery alarm. Alarm notification. When someone press the doorbell, you will receive a notification that APP pushed. Two Way Audio. Clearly communicate with visitor in real-time (Doorbell can support two-way audio via APP, but that screen can't support real-time talk, it only support watch the ). Clear Night Vision. Provide monitoring in day and night. NOTE:Before scanning to connect to the Smartphone, please press the button of the screen for 5 seconds until hearing prompt from the doorbell. Support Max 128G SD Card(Not Include) and Cloud Storage for alarm recording. Smart playback. If insert -SD Card, you can check the playback at anyday. Download free APP "Smart Life" or " TuyaSmart" from or AppleStore. 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 less than 5%, the device will prompt low battery, when the battery is low, APP cannot link the device. Camera Resolution:1 Million pixels, resolution 1080P HD. Camera View Angle:166 degrees. Display:4.3 inch TFT color LCD screen. APP:Tuyasmart/ SmartLife Motion sensor reaction time:low sensitivity, middel sensitivity, high sensitivity optional in APP, high sensitivity about 1 to 3 seconds delay. Video format: . (need TF card) or buy cloud service. Motion sensor detect distance about 2 meters. Door thickness:35-115mm (please measure door thickness before purchase). Peephole diameter:15-60mm. Doorbell share:yes. Working Temperature:-20℃ to 55℃. Colour:As Shown Material:Plastic+Metal Package Contents: 1 * Tuya Smart Door Bell