Feature: 1. Real Time Monitoring: Support real time monitoring on mobile phones, even if you are away from home, you can actively wake up monitoring anytime and anywhere. 2. Human Body Induction: 24 hours to automatically sense abnormalities, take snapshots and recording, and push abnormal messages to the mobile phone at the same time. 3. Infrared Night Vision: Using intelligent infrared recognition, it will automatically switch to night vision mode when the light is insufficient. 4. Wide Angle Lens: 166 degree super wide angle lens, avoid blind spots, blind spots, and effectively monitor outside doors, courtyards, corridors, aisles, etc. 5. WiFi Wireless Connection: 2.4GHz WiFi connection, no need of wiring, stable signal. Supports two way audio, with echo cancellation. Specification: Item Type: WiFi Video Doorbell Material: ABS Model: V20 Use: Household Colour: Black Battery: 2 x 18650 lithium batteries (not included) Plug Voltage: 90-260V Viewing Angle: 166 degrees Resolution: 1920 x 1080P Infrared Night Vision: 6pcs 850nm high-power infrared lamps Motion Detection: Support Signal to Noise Ratio: ≥39db Audio: Built-in speaker and microphone Use APP: for Ubox WiFi: 2.4GHz Two Way Audio: Support, with echo cancellation Storage: Maximum support 32GB memory card (not included) WiFi: 2.4G 802.11 b/g/n Door Bell Working Frequency: 433MHZ Output Power: 0.15W Standby Power: ≤10mW Sensitivity: -112dbmm Volume: Maximum 100 decibels Working Temperature: -10℃-50℃. Package List: 1 x Doorphone1 x Door Bell1 x Shell5 x Screws4 x Expansion Tubes1 x Small Hex Wrench1 x Double Sided Tape2 x Manual