Smart Doorbell,Wireless Remote Video Doorbell Intelligent Visual Doorbell Home Intercom HD Night Vision Wifi Rechargeable Security Door Doorbell Features: High definition clear video with 90 viewing angle, display the details in front of your door,reliable and practical WIFI connection, no wire needs, achieve a two way intercoms between the doorbell and mobile phone.Real-time mobile phone, support two-way calls, photos, recording, caring for your family makes you more secure Disassembly free cycle charging, built-in 1000MAH lithium ion high-capacity battery, more than 6 months of normal use,Charging time 1.5 hours Equipped infrared night vision, automatically open at night, Support 128GB SD card storage (not include) & cloud storage The doorbell can be controlled by APP, automatical work model, intelligent and portable.Portable in size and weight, convenient to install and remove Product parameters: Product Name: smart doorbell Main control model: bk7252 Sensor model: gc0328 Photosensitive: support Audio input: 1 channel Audio output: 1 channel Infrared drive: max. 50mA 2 keys: doorbell key and RESE-T key 2 indicators: equipment status indicator and charging indicator Battery interface: 1 way Charging power supply: DC 5V Maximum resolution: 1080p Video coding standard: M jepg Video frame rate: VGA 20fps Day night switching mode: automatic Video preview: support, 1-way P2P Sound acquisition: support Video transmission encryption: support Dingdong RF Code: EV1527 Infrared lamp control: automatic, sensitivity level Adjust Wavelength of infrared lamp: 850nm Distribution mode: Bluetooth distribution Cloud storage: Yes, three-day rolling storage is provided by defaul-t Storage:Max 128GB SD Card (not support) Connection mode: 2.4GHz, WiFi Power supply mode: battery power supply Battery capacity: 1000mah Battery power detection support, voltage is lower than 3.4V, unable to wake up Firmware upgrade supports remote upgrade Operating temperature: - 10 ~ 45 Working humidity 95% Doorbell machine size: 7.5x4.5cm/ 2.95x1.77 inch Dingdong machine size:4.5x3.5cm/1.77x1.38 inch Package size:10x9x5cm/3.94x3.54x1.97 inch Gross weight: 175.3g/0.39 lb Package Includes: 1 x Doorbell Machine 1 x Internal ding-dong Machine 1 x Charging cable 1 x Adhesive installation aid 1 x Manual