Features 1、Built In 2000mAh Lithium Battery: This video doorbell camera has a built in 2000mAh lithium battery, no need to remove and replace, no need to charge frequently, charging a use time of about 3 months, and low power attention to your and your family's safety. 2、IR Night Vision Function: This wireless video doorbell comes with adaptive infrared night vision function, which can automatically switch between daytime or nighttime mode, HD infrared night vision to see the night visitors. 3、Video Call: You can easily handle visitors with push notifications sent to your phone when someone rings the doorbell. Enter the mobile video chat interface to communicate with visitors. It supports up to 10 members for simultaneous sharing. 4、Cloud Storage: This wireless doorbell camera can catch and store videos in the cloud. When a visitor rings the doorbell, it records their photo and saves it in the cloud. Access past images anytime on the mobile app for added security. 5、Wide Application: This smart video doorbell security camera has a wide range of applications, and supports for Android and for IOS APP, which can be widely used in home, office, laboratory environment, etc., medical and so on. Specification Item Type: Wireless Video Doorbell Material: ABS Doorbell Battery: Lithium Battery x 1 (2000mAh) (Shipped With Built In battery) Lens Pixel: 1080P APP: Support for Android, for IOS Application: Household, Office, Laboratory Environment, Medical, etc. Package List 1 x Doorbell 1 x Dingdong Machine 2 x Installation Screws 2 x Expansion Screws 1 x Power Cord 1 x Manual 1 x Adhesive Tape