3.5-inch high-definition visual digital doorbell 120-degree wide-angle wise cat eye long standby time home monitoring Features: Mini open air digital camera 3.5-inch LCD colour display screen OV Industrial High Definition Color Image Sensor one hundred twenty diploma actual viewing attitude 24 hours monitoring Specifications: Type: magic eye Material: Zinc Alloy Type: Digital Doorbell LCD screen: 3.5 inch Sensor: 2 Mega CMOS Sensor Function: Energy saving, Low Power Alert Power supply: 4pcs AAA batteries (not included) Door Hole Range: 14-28mm Door Thickness Range: 35-100mm Keyword: digital door viewer Power source: 4pcs AAA batteries door gap diameter: 14-28 mm Door Thickness: 35-100 mm Indoor system size: 120x62x20 mm Diameter (camera outdoors): 30 mm Net weight: 197g Note: 1. There could also be slight length deviations thanks to handbook measurement, diversified measuring tips and tools. 2. The photograph may not mirror the actual coloration of the item because of assorted photographing light, perspective and display monitor. package: 1 x Outdoor Unit 1 x Indoor Unit three x Screw 1 x Metal bracket Function operation: Press the power button to turn on the show image, you may be aware the scene outside the door in genuine time through the exhibit screen, and routinely close down after 15 seconds of energy on. 1. Power on: Press the power button 2. Shutdown: It will mechanically close down after 15 seconds of strength on, and it'll also be shut down via lengthy pressing the ability button for three seconds in the power-on state. Installation diagram and installation instructions: Step 1: Open the screw pack and select screws of correct size according to the thickness of the door. Screw two screws into the metal protruding rods of the outdoor unit in advance. Step 2: Insert the outdoor unit into the door hole, remove the steel bracket from the again of the foremost unit, cross the cable of the outside unit in the course of the higher slot gap of the metal bracket, cross the screw through the lower slot gap of the metallic bracket, and hold the steel bracket at the door on the screw of the external machine sticking out rod. (Note: the triangular notch of the door outdoor unit is upward, and the arrow course of the metal bracket is upward). After checking the direction of the door open air unit and the steel bracket, push and pull the steel bracket to the left in order that the metallic bracket is locked via the screw. Then tighten the two screws until the bracket and outside unit are securely fastened. Step 3: Open the battery hide of the host, and put the battery into the host (the battery hide has the battery polarity mark). Step 4: Align the 4 slots on the back of the indoor unit with the four hooks of the metallic bracket, and then pull down the indoor unit firmly until it's locked. Step 5: Peel off the protective movie at the floor of the indoor and open air units. Installed.