1. Doorbell feature: After press the doorbell, the screen will auto light up. 2. Take Photo: You can take photo when the screen light up manually. 3. 0.3MP camera and 2pcs IR leds: With 2pcs IR leds, you can check who's outside at dim environment clearly. 4. 4pcs AAA battery(no including) power on: This door viewer is designed with low consumption. 1, 2.8 inch color screen; 2, 0.3MP camera with 90 degree view angle 3, With 2pcs IR leds, support clear night vision at night 4, Doorbell feature 5, Press the power key to take photo manually 6, One key to monitor outside 7, One key to delete all pictures 8, Built-in cyclic storage in device to store pictures 9, Fit door thickness: 35-120mm, fit door hole diameter: 14-22mm Power: Dry battery Display: Color Connection Type: wireless Item Type: Peephole Alarm: No Battery: no including Size: 2.8 inch LCD screen Vision angle: 90 degree Temperature: -20 to 55 degree Camera: 0.3MP Memory: Built-in cyclic storage in device colour:gold Material:plastic size:Door hole diameter: 14-28mm Applicable door thickness: 35-120mm Package Contents: 1 * display 1 * doorbell 1 set * installation accessories Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.