When you have a visitor, you can see the view, talk with visitor, and record a short video.Without opening the door, you can know what is happening outside the house. Specifications: Model: V7 Color: Black Chip (CPU): GM8135S Sensor: 1080P, GC2033 CMOS Sensor Lens: 166 Wide-Angle Camera Lens Sensor Performance: Supports Automatic White Balance, Automatic Gain Control, Automatic Backlight Compensation Signal to Noise Ratio: 39dB Minimum Illumination: 0.8Lux/F1.4 (Color Mode); 0.3Lux/F1.4 (Black White Mode) Video Format: H.264 Video Resolution: 1080P Frames Per Seconds: 15fps-30fps Wifi: 2.4GHz Wifi, Support 802.11 b/g/n Memory: Support cloud storage (For now, the hardware doesn't support TF card storage) Operating Voltage: DC: 5V/1.5A Storage Temperature: 0 #xff5e;50 Operating Temperature: -10 #xff5e;50 Working Humidity: lt;95% Wake-up Method: Push doorbell button to wakes up; Wake up by motion detection; Wake up from APP Power Supply: 2 * 3.7V 2600mAh Lithium-Batteries (1-8-6-5-0) (Not Included) Item Size: 128 * 65 * 27mm / 5.04 * 2.56 * 1.06in Package Size: 202 * 96 * 80mm / 7.95 * 3.78 * 3.15in Package Weight: 325g / 11.46ounces Note: 1.Due to the different display screen and light effect, the actual color of the item might be slightly different from the color showed on the pictures. 2.Please allow a little measuring deviation due to manual measurement. Package List: 1 * Doorbell 1 * Screw Kit 1 * Sticker 1 * User Manual