... make you can watch clearly3. 2.8 inch TFT-LCD indoor unit for monitor4. No wire, installed in the peephole, just DIY using5. Standalone ... power supply. How do we find a plug in the door?6. Automatic power saving, low power remind function7. Super ... new alkaline batteriesCamera: 0.3 Mega Pixel cameraDisplay Screen: 2.8-inch high definition screen TFT-LCDPeephole size:15mmCamera angle of view: 105° ...