Features: Support Wi-Fi 2.4 GHz, IEEE 802.11b/g/n, no need any wire. HD720P images with 166 degrees wide viewing angle, providing you with a clearer and broader perspective. 6 IR Leds with IR-CUT filter mode are automatically switched by optical sensors, it can monitor and capture images in low illumination environment. Built-in 3350mAH batteries, ultra low power and long service time for 3~6 months. PIR motion detection and anti tamper alarm function, it can automatically record or capture photoes and will send your alarm information to your phone if there is motion. Support mobile phone monitoring (for iOS, Android). You can view the outside of the door,and you can make video and audio calls and record a short video when you find a visitor outside the door. Mobile detection sensitivity can be adjusted to avoid false alarm and save power. When a guest rings the doorbell, the doorbell automatically shoots video and upload to cloud storage. Supporting Cloud Storage Recording (Note that this product only supports Cloud Storage and does not support Local Memory Card Storage). Super Wifi transmission penetration technology. Built-in super Wifi receiving and sending module, can easily deal with barriers such as stainless steel doors, wooden doors, iron doors and so on. Two-way voice intercom with echo cancellation, built-in one speaker and one microphone, make sure the clear sound intercom. Support links for Amazon Alexa. Specifications: Main Control Core: Hi3518E Sensor: 1/4 COMS OV9732 Video: 1280*720@25fps, H.264 adaptive bit stream, adapted to a variety of network modes (WIFI 3G 4G) Audio: Two-way voice intercom, echo cancellation, built-in 1 speaker, built-in 1 microphone Lens angle: 166 degrees wide angle Connections: WiFi 2.4 GHz, IEEE 802.11 B G n, AP Hot Spot Connections, Scanning Two-Dimensional Codes Storage: cloud storage supported Video Recording: Local Video Recording on Holder, Video On Demand Playback, Video on Demand Playback on Holder, Video on Demand Playback Screenshots: Real-time screenshots of mobile phones Active Wake-up: Remote Active Wake-up PIR Wake-up Device Key Wake-up Quick startup: within milliseconds of system startup Message Push: Extreme Push 1-2 seconds Mobile detection: PIR mobile detection, sensitivity adjustable (2 seconds) / (5 seconds) / (10 seconds) Scene: Backlight Compensation, Infrared Night Vision, Strong Light System, Fast Motion, Digital Wide Dynamics User: Supports 2-D code sharing, with a maximum of 7 users. Online viewing supports 3 users at the same time Batteries: 3.7V, 2 18650 batteries, 3350mAH, rechargeable (14V~24V AC). (Batteries excluded) Power consumption: working current 170 mA, standby current 160 mA Size: 13.5*6.7*3.1cm/ Package Weight: 367g/12.9oz Package List: 1 * Doorbell 1 * User Manual 1 * Installation Kit 1、Two-way voice intercom with echo cancellation, built-in one speaker and one microphone, make sure the clear sound intercom. 2、Super Wifi transmission penetration technology. Built-in super Wifi receiving and sending module, can easily deal with barriers such as stainless steel doors, wooden doors, iron doors and so on. 3、Supporting Cloud Storage Recording (Note that this product only supports Cloud Storage and does not support Local Memory Card Storage). 4、Two-way voice intercom with echo cancellation, built-in one speaker and one microphone, make sure the clear sound intercom. 5、PIR motion detection and anti tamper alarm function, it can automatically record or capture photoes and will send your alarm information to your phone if there is motion.