Detailed Product Description Wireless Intercom with door release:1.Feature(1).2.5TFT Screen.(2).2.4 GHz Wireless Video Intercom.(3).Video Intercom.(4).Remote Unlock.2.Function Install:Surface Mount(outdoor) + Portable Handset(indoor)(1). 2.5TFT Screen.(3). 2.4 GHz Wireless Video Intercom and Surveillance(4). Portable hand free Indoor unit (5). Doorbell & Door phone (6). Intelligent Remote Unlock3 ...