Smart Video Doorbell Wireless HD Camera PIR Motion Detection IR Alarm Security Door Bell Wi-Fi Intercom for Home Apartment Features: Long Standby: No disassembly cycle charging. Built-in lithium-ion high-capacity battery, long standby. The doorbell is powered by built-in large battery, no need to charge frequently; and the chime is of USB power supply, easy and convenient for use. Video Call: Easy to deal with visiting guests, when someone presses the doorbell, the doorbell will push notification to the phone, and the owner can enter the phone video conversation interface. Portable Installation: Can be pasted and perforated. Support adhesive backing, no need to punch holes, while supporting hole punch installation. No plugging, convenient and hassle-free. Capture Screen: Storage to the cloud, security conservation drip. When a visitor presses the doorbell, it can capture the visitor's picture and save the record to the cloud, so that the cell phone APP can view the past pictures at any time, which is safer and more secure. Wireless Video Doorbell Camera: Support 2.4G WiFi and APP connection, 480P high resolution, presenting you clearer pictures & videos and more details. 2-Way Audio: With built-in mic, you can see and talk to your visitors at anytime and anywhere.  Night Vision: Built-in high-quality IR LED lamp beads and light sensor, the picture is clear at night; also can automatically switch to night mode from day mode after the ambient light drops down to 2 Lux. Strong and stable signal, easy to pair up, transmission range up to 50 meters, ring tones and volume can be adjusted according your preference.  Specification: Name: Smart Doorbell Material: ABS Plastic Electronic Components Color: White Max. Resolution: VGA, 640*480 Video Coding Standard: MJEPG Audio Coding Standard: G711.A Video Frame Rate: VGA@20fps Day/ Night Mode Switch: Automatic Video Transmission Encryption: AES Radio Frequency Coding: EV1527 Infrared Lamp Control: Automatic, Adjustable Sensitivity Infrared Lamp Length: 850nm Motion Detection: Automatic, Adjustable Aensitivity Connection Mode: 2.4G WiFi Working Temperature: -10～45℃  Working Humidity: ≤95% Doorbell Battery Capacity: 1000mAh Package list: 1*Smart Doorbell 1*Usb Cable 1*User Manual 1*Some Screws