Feature: 1. Can add up to 32-channel sensor accessories including remote control door sensor IR detector intelligent shock sensor smoke detector Gasleak detection indoor leak detection and so on; 2. One-touch voice navigation electronic pronunciation simple and easy; 3. Free to choose Arm/disarm mode; 4. Doorbell; 5. Low power prompt alert when the door sensor is in low battery camera will send remind message and sounds to remind user to replace the battery. 1.0MP HD camera plug and play; network penetrating power is up to 99%; H.264 compressed format supports TF card up to 32GB; Supports two-way voice talkback Built-in IR-CUT; Supports IPHONE / IPAD / Android cellphone / Tablet PC; PnP server cluster is all over the world to ensure all the server steady high-efficiency operation; Two-dimensional code scan add camera exclusive patented technology safer and more secure; 433MHz wireless door / window magnetic; Battery：2 x AAA 1.5V (not included).