When a visitor presses the smart doorbell, the sound is activated and the camera sends a notification to your phone. It has two-way communication, PIR motion detection and IR night vision to protect your family more effectively. The smart doorbell provides you with security at home, bringing you safety and convenience! Features: [720P video and 166 wide angle]- 1280*720 resolution with 166 degree viewing angle ensures clear and stable videos and images. 3 wake-up methods: press the doorbell button / PIR detection / mobile phone app. [APP Control & Two-Way Audio]- Download the mobile app to connect the doorbell with Wi-Fi 2.4 GHz, and you will be able to detect and secure your home wherever you are. Noise-free two-way audio allows you to easily talk with your visitors. [PIR Detection]- Support PIR motion detection, when someone walks outside the door, the doorbell will immediately send a message alarm on your mobile phone (set the function in APP in advance). [IR Night Vision]- Day and night mode automatically switches, no matter day or night, the image is clearly visible to accompany you and your family in complete safety. IR night vision activates when illuminance is less than 2 lux. [2 storage methods]- Support cloud storage service for convenient use. Or you can use a TF card (not included) to store videos, and it supports auto loop recording if the card is full. [Low consumption and easy installation]- Powered by lithium battery ( not included) / USB interface / AC input, select as practical needs. No wires required, easy to install with mounting bracket, screws and self-adhesive tape. Note: 1. Please read the user manual carefully before use. 2. Doorbell batteries and TF card are not included. 3. The size and color may be slightly different due to manual measurement and different light conditions or other reasons, please in kind prevail. Thank you for your understanding. Specifications: Color: silver and black/silver (optional) Material: ABS Resolution: 1280 * 720 Angle field of view: 166 IR night vision: 6 pieces LED 850nm Wi-Fi: IEEE 802.11 b / g / n Audio: Two-way talk without noise App download: WoWCam PIR motion detection: support Wake-up method: press the doorbell button/PIR detection/APP Power supply: 3*lithium battery (not included)/USB interface/input CA Storage: cloud storage or 8G/16G/32G TF card (not included) Power consumption: 200uA Working current: 170mA Doorbell size: 14.4 * 7.5 * 3.3 cm / 5.7 * 3.0 * 1.3 inch Doorbell weight (without batteries): 140g / 5.0 oz Package size: 18.8 * 10.5 * 4.5cm / 7.4 * 4.1 * 1.8in Package weight: 260g / 9.2 oz Package list: 1 * doorbell (including mounting bracket) 1 * set of installation screws 1 * self-adhesive tape