When a visitor presses the smart doorbell, the sound is activated and the camera will push notification to your phone. It Features two-way communication, PIR motion detection and IR night vision to protect your family more effectively. Smart doorbell provides home security for you, bringing you safety and convenience! Features: [720P Video & 166 Wide Angle] -- 1280*720 resolution with 166 degree viewing angle ensures the clear and stable videos and images. 3 wake-up methods: press the doorbell button/ PIR detection/ mobile phone APP. [APP Control & 2-Way Audio] -- Download mobile APP to connect doorbell with 2.4GHz Wi-Fi, and you can detect and secure your home wherever you are. 2-way audio without noise allows you to talk with your visitors conveniently. [PIR Detection] -- Support PIR motion detection, when someone wandering in front of door, the doorbell will push alarm message to your mobile phone immediately (set the function in APP in advance). [IR Night Vision] -- Day and night mode switch automatically, no matter day or night, image is clearly visible to escort you and your family's safety all the time. IR night vision will turn on when the illuminance is less than 2Lux. [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 & Easy Installation] -- Powered by lithium battery/ USB interface/ AC input, select as practical needs. No wire required, easy to install with mounting bracket, screws and self-adhesive tape. Note: 1. Please read the user manual carefully before use. 2. TF card is not included. 3. Size and color may be slightly different due to manual measurement and different light conditons or other reasons, please in kind prevail. Thanks for understanding. Specifications: Battery: No Battery/ with Batteries (Optional) *Battery: 3 * 3.7V 2600mAh Lithium Battery Color: Silver & Black/ Silver (Optional) Material: ABS Resolution: 1280*720 Field of Angle View: 166 IR Night Vision: 6 pieces 850nm LED 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: Lithium Battery/ USB Interface/ AC Input Storage: Cloud Storage, or 8G/ 16G/ 32G TF Card (Not included) Power Consumption: 200uA Working Current: 170mA Doorbell Size: 14.4 * 7.5 * 3.3cm / 5.7 * 3.0 * 1.3in Doorbell Weight (without batteries): 140g / 5.0oz Package Size: 18.8 * 10.5 * 4.5cm / 7.4 * 4.1 * 1.8in Package Weight: 260g / 9.2oz (No Battery); 372g / 13.12 (with Batteries) Package List: 1 * Doorbell (including mounting bracket) 1 * Set of Installation Screws 1 * Self-Adhesive Tape 1 * User Manual (English)