Item Type: Video Doorbell Model: W3 Material: ABS Sensor: 1080P COMS sensor Lens: 6G wide angle 2.2mm lens. Angle of View: 120 horizontal, 150 diagonal . Video Stream: Main stream 1280 x 720, 15fps. Sub stream 640 x 360, 15fps. CMOS: Supports automatic white balance, automatic gain control, and automatic backlight compensation. System: For Lite OS. Standby Time: About 6 months. 10 wakeups per day, 30 seconds per session. Day Night Conversion: Automatic switching of dual filters. Infrared Distance: 850nm infrared, with limited distance of 5m. Network Configuration: QR code distribution network, sound wave, WiFi fast connection. PIR Detection: Supports PIR detection wake up. Audio Coding Standards: AAC and G.726. Audio Input and Output: -38dB microphone, built in speaker. Recording: Automatic recording, event recording. WIFI: 2.4GHz Network Protocols: TCP/IP, HTTP, TCP, UDP, SMTP, DHCP, DNS, PDP. Wireless: WIFI082.11b/g/n wireless network. Passive Infrared Detection: Supporting Adaptive Bit Rate: Supporting 2 Way Audio: Supporting Sleep Time: Adjustable for 15s, 30s, 60s. Voice Call: Supporting Remote Wake Up: Supporting PIR Wake Up: Supporting Mobile APP: For Ubox, for IOS 11.0, for Android 6.0 or above. Storage: Memory card, shipped without memory card. Power Supply: 2 x built in 3.7V lithium battery with 4400mAh capacity.