Features:1. 4.3 Inch Large Color HD Rear Screen Camera: Even children and the elderly can see who is on the street. Not only the doorbell, but also the security guard for your home.2. 140 degree Camera with Motion Sensor: Wide-angle camera, support automatic photo or video recording when motion is detected (need to install SD card, not including).3. Multilingual Menu: Menu supports multiple languages, English/Russian/Spanish/French/Italian, etc.4. Rechargeable Battery 2500 mAh: Support max. 32GB SD card (optional), Built-in 1 unit of 2500mAh battery, support power supply and charging android charger directly (charger not included).5. After-sale Service: If you have any questions, please contact us immediately and we will help you solve it as soon as possible.Specificaitons:Display: 4.3" HD displayCamera: One million professional security cameraAngle: 145 degrees ultra-wide angleFunction: Super night vision, doorbell no disturbance function, PIR motion detection, human body induction, photo, audio and video recording, video message functionBattery: 2500MAHA variety of music ringtones can be selected, multi-languageRing tone size can be adjustedMaximum support 32G memory card (need to buy separately)Door Thickness: 30-110MMDoor Hole Range: 15-38MMincludes:1 * Indoor Mainframe1 * Outdoor Subcomputer1 * Battery1 * USB Charging Cable1 * Metal Wall Plate1 * Screw Package1 * English Operation Guide