A 100% Wire-free Security Camera - powered by professional long-lasting batteries, the BC3-SP wireless security camera is totally wire-free. You can mount it anywhere indoor & out to monitor you property, without running any cable at all. NOTEif you use this camera with your NVR, make sure to upgrade NVR to 3.1.6 or later for better performance. Enough Defense to Secure Your Place - with both spotlight and siren built-in, the camera light up the area and let out siren when people detected. In the meanwhile it sends alerts to your phone. On your phone, you can choose to use only spotlight, only siren, both or none. 2-way Audio & Alert Settings - With two-way audio, you can hear and talk to people on-site in real time. Plus, customizable alerts let you set detection zones, adjust sensitivity, schedule notifications, and turn them off as needed. The daily alert summary gives you a quick overview of all events. Offline feature - As a standalone new CCTV system, the WiFi camera syst