Item Type: Video Doorbell System Material: ABS, Stainless Steel Usages: Digital door viewer is suitable for all kinds of places, such as families, apartments, office buildings, hotels and other places. Iron doors, wooden doors, anti theft doors, glass wooden doors, etc. can be installed. Display: 2.4in TFT color screen Viewing Angle: 160 Camera: 1MP pixels Applicable Door Panel: Approx. 35-110mm/1.4-4.3in Applicable Peep Hole: Approx. 15-25mm/0.6-1.0in Battery Type: Built in 1PC 3.7V 1200mAh lithium battery Battery Model: BL-5C Package List 1 x Door Viewer Camera 1 x Screen 1 x Mounting Plate 6 x Screw 1 x USB Cable 1 x Manual Do not place the product in an environment that is too humid and high temperature. 1Home Security System: 1MP HD surveillance camera with clear image. 160 wide angle, large field of view and smaller monitoring dead angle to protect home security. 2One Click Shoot Design: The one click shoot function is fast and convenient, which is very suitable for the elderly and children. Press the MENU button at any time in the viewing state to store the current screen information. 3Smart FIFO Function: When the memory is full, the video doorbell system will automatically overwrite the previous photos in chronological order, and there is no need to regularly clean up the content. 4Rechargeable Host: Come with built in high capacity lithium battery, when the battery is dead, you can also use the power of the mobile power bank (not included) to charge the host. 5Usages: Digital door viewer is suitable for all kinds of places, such as families, apartments, office buildings, hotels and other places. Iron doors, wooden doors, anti theft doors, glass wooden doors, etc. can be installed.