1. Photo &Video Recording 2. Recycled120pcs Photos built-in Memeory, support 32G TF card 3. Super Clear Image even if against the sun,Wide View Angle,Clear image 4. "Do Not Disturb" Option 5. Night Vision 6. Doorbell Funtion, auotomatically photo snap when visito press the doorbell key 7. Low Power Consumption, 4 AA batteries. 8. Multi Language Supporting Fits door: 40-110mm (1.58"-4.32") Fits barrel hole: 14-25mm 3.5 inch: HD TFT LCD Sensor: 1.3Mega Pixel Viewing Angle: 165 Degrees(D) /120 (H) Power Source:4 AA batteries (Usually more than 3 Years to change) Product Size: 135*86*23.9mm Color: silver, gold or customized