1080P 4.3in Video Doorbell Camera with Display 170° Wide Angle Night Vision 2 Way Talk for Home Security Display Screen: 4.3 inches Power Supply: DC5V/2A Sound Information: Built in speaker and microphone Connection Method: BT interconnection TF Storage Card: supports expansion Perspective: 170 ° Night Vision Type: LED auxiliary lighting Working Temperature: -10 ° -60 ° 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) Supported Format: MJEPG Pixel: 1080P Battery Capacity: 1000mAh. After being fully charged, press 10 times a day for up to 2 months (the further the distance, the more severe the power consumption)