Feature --- 1. WIFI connection, no wire needs, achieve a two way intercoms between the doorbell and mobile phone. 2. support two-way calls, photos, recording. 3. Equipped infrared night vision, automatically open at night 4. APP Remote Control 5. Easy to Install Specification --- Item Name: Smart Wireless Remote Video Doorbell Sensor: 30W gc0328cmos sensor Lens: 80 ° wide angle lens Signal to noise ratio: ≥ 41db Video format: jpg Recording mode: press key to recording Battery capacity: 800MAH Ding Dong: support rf433mhz Ding Dong Power input: 5V/2A Storage function: TF Card (maximum support 64GB), excluding Recording range: 5m Wireless connection: support 2.4G WiFi，not support 5G WIFI System support: Android 4.3 or IOS 9.0 or above USB interface: type-C Door bell size:9x5x2.5cm/3.54x1.97x0.98 inch Ding dong machine size:5x4.5cm/1.97x1.77 inch Package size:12x10x5cm/4.72x3.94x1.97 inch Gross weight:150g/0.33 lb The Package Include: 1 x Smart Wireless Remote Video Doorbell 1 x Dingdong machine 1 x Use manual 1 x Installation tool 1 x Charge cable