This wifi doorbell can connect home WiFi and achieve a two way intercom between the doorbell and cell phone. When a visitor presses the doorbell, sound is activated and the camera will start sending real time call to the cell phone. The user will receive the call and can check who the visitor is, can intercom with the visitor. It can make your life easier, smarter and safer. It's highly cost effective Features - Color: As shown. - Material: ABS. - Size: 13.6 x 5 x 2.8 cm. - Pixel: 2MP. - sensor: CMOS. - Horizontal resolution: 1080TVL. - Resolution: 1080P. - Lens: 2.8mm. - S / N ratio: gt; 48 db. - Working temperature: -50-50 . - Power supply voltage: 5V. - Irradiation distance of infrared lamp: 6-8m. - Supports up to 64G TF memory card. - Lens angle: 166 . - Support WiFi connection, APP remote control. Easy to install and use. - Ultra-low power consumption, with long standby time, remote active wake up, quick start. - When you open the APP, if a visitor presses the doorbell, the APP will get a call, it's free. - Rainproof: Doorbell can be installed outdoors, do not worry about being drenched by rain. - Support up to 64G TF storage(not included).