Features: · The mobile phone supports real-time monitoring. · Video Talking, 720p high-definition video two-way voice call. ·Operation by app, without any complicated wiring and cumbersome settings, just start the machine with one button, download the X SMART HOME APP, and follow the instruction to use. Specifications: · Style: wifi video doorbell · Type: Network Camera · Pixel: 720p (dpi) · Horizontal resolution: 720P (TVL) · Resolution: 1280*720P · Lens: 1.7 (mm) · S/N ratio>: 39 (db) · Backlight compensation: infrared light · Power supply voltage: 3.7 (V) · Effective distance: remote · Surveillance camera lens: infrared · Battery: 3600 MAH Battery . Charging Time: 3 Hours . Size: 15x7.7x3.5cm . Battery Life: 6 Months After Fully Charged Pacakge includes: 1*WIFI doorbell 1*USB charging cable 1*Receiver 1*Instruction