Wireless video intercom is completely developed by Tech-Security Electronic Technology Co., Ltd, using our latest 2.4G wireless AFH technology. Our video doorbell can be equipped with the basic functions: video intercom,remote unlock, infrared night vision, 12 ringtones selectable, brightness adjustable, unlock time control, multi-lock mode (power-on unlock and power-off unlock), self-configure-code, rainproof cover and AA battery for cameras, And optional function: Photo-taken and Video-recording with 1G Memory Card. Most advanced function in the whole world---Rainproof Cover and AA Battery for Outdoor Cameras, Outdoor cameras can work independently without home electricity.And we will soon issue new product which will be power supply by solar panel, it's really make us go into the wireless area.