Two-way Audio & Built-in 64G SD Card Advanced mic camera with anti-noise filter can eliminate environmental noise and enhance outdoor camera's sound quality. You can hear very clearly. Besides, 2 way audio camera allows you to listen and talk to your visitors. you can start a new conversation remotely. This Wi-Fi CCTV camera pre-built-in 64G SD card can store around 7 days videos. if you record 24/7 This security camera will re-write the SD card automatically when its storage is full. Motion Detection & Customized Alert Ringer bell. The most attractive feature of the Wi-Fi security camera with speaker is you can choose system ring bell or set your special ring bell. No need to worry about use the same ring bell with neighbors and you will never mistake your alarm and your neighbors.   When this auto tracking IP surveillance camera monitors movement its alert will ring and capture the picture then send you alarm E-mail and notification , so you can take protect action immediately. Wireless Easy Connection Wireless connect way helps to achieve true "Plug & Play", just power on the 5MP Wi-Fi camera and connect to your Wi-Fi then it begin to protect your safety. Wi-Fi connection also breaks the limitation of Ethernet cable's length, so you need not worry about cable aging problem, it is safer and saves you money. Please test the Wi-Fi signal before you mount the camera to its final position in order to avoid problems caused by poor Wi-Fi signal strength. H264+ Technology with advanced Chip Technology this outdoor camera wireless has H.264+ compression technology it only needs a half storage to save the same amount of video content compared with H.264.   H264+ also improves the videos quality and has better network compatibility. This home surveillance camera has a stable software system and new advanced chip for the latest Android & IOS devices.