Display Screen: 4.3 inches Power Supply Information: DC5V/2A Audio Information: Built-in speaker, microphone Wireless Mode: 2.4G Visual Angle: 130 degrees Night Vision Type: infrared night vision Working Temperature: -10 °~60 ° Video Processing Rate: 640x480 Image Sensor: GC0328 Open Space Distance: 50-60 meters is better, but in the case of obstacles, it is about 20 meters (specific to the material of the obstacle) Battery Capacity: 1200mah. After being fully charged, press 10 times a day for up to 2-3 months (the farther the distance, the more severe the power consumption) Screen Size: 11.7*9.3*1.6cm Doorbell Size: 10.7*4.1*1.9cm Notes: 1. The product screen has a protective film, the screen is not touch-screen models. 2. The monitor needs to be connected to an external power source for long-term use. 3. The screen needs to be turn on, the doorbell button can be activated. Packing List: 1 x Wireless Doorbell 1 x Display 1 x Charging Cable 1 x User Manual 1 x Large Base Plate 1 x Small Base Plate 1 x Large Back Sticker 1 x Small Back Sticker 1 x Screw Set