1. RTOS operating systems. 2. Ultra-low Power Consumption Design,if everyday use 10 times,the machine can use more than 8 months. 3. Easy installation (no need any cable),just WiFi connection, wired installation optional. 4. Dual-powered: runs off the internal battery or can be connected to existing doorbell wiring. 5. PIR motion-activated alerts (passive infrared detection) alarm. 6. Built-in Ding Dong, Support IR automatic night vision function. 7. APP support iPhone, Android, Support two-way speaker function. 8. Built-in Lithium Battery and easy charged by USB. 9. Automatic take a picture when visitor press doorbell. 10. When someone touch the outdoor doorbell, the indoor or doorbell will ring and remind the host open the door. 11. WiFi mode: WiFi 802.11 b/g.
