1080P HD Video Intercom Doorbell Smart It will alert you when detects someone approaching,remind by message or call,it will protect your family more effcttively. Please Note : this doorbell only use 2.4G wifi work , NOT Support 5G WIFI How do you install battery or sd card ? There are total 7 options for you:ome/house wifi signal is about 15-30 meters in the open air without obstructions, the wall. If you need longer signal range, you can add one wifi extender Tips: 1. When using the camera for the first time, you need to charge the battery for more than 10 hours 2. Camera needs to use 2pcs 2600mAh convex batteries, the size is 18x65mm, 3.7V Product Size How to connect the camera via Tuya APP? Specifications: 1.1080P Full HD pixels 2.160 wide-angle lens, allowing your viewing angle to be wider 3. Support PIR motion detection, and send a notification when a moving object is detected 4. Support Wi-Fi 2.4 GHz, IEEE 802.11b/g/n 5. Support key wakeup, PIR detection wakeup, mobile phone active wakeup 6. Support two-way audio, built-in 1 speaker and microphone, with echo cancellation 7. Maximum support 64GB TF card (Optional) 8.2pcs 18650 battery. Wake up 15 times a day, 15 seconds each time, 3~4 months (Optional) 9.APP: Tuya 10.Support Smart Life