【2.8-inch HD Display】Features a high-definition color screen for clear and vibrant image quality. 【90° Ultra-Wide Angle】Professional security camera with a wide-angle lens for comprehensive coverage. 【Night Vision & Motion Detection】Equipped with night vision capabilities and PIR motion sensors for 24/7 surveillance. 【Anti-Theft Design】Robust construction to prevent tampering and unauthorized removal. 【Multi-Language Support】Available in four languages: Simplified Chinese, Traditional Chinese, English, and Russian. 【Long-Lasting Battery】Built-in 2000mAh lithium battery for extended operation without frequent charging. 【Do Not Disturb Mode】Includes a feature to prevent unwanted notifications during specified times. Specifications: Display: 2.8-inch high-definition color screen Camera: 90-degree ultra-wide angle, photo and video capabilities Night Vision: Equipped with infrared night vision Motion Detection: PIR sensor for human body detection Battery: 2000mAh built-in lithium battery Storage: Supports up to 128GB TF card (FAT32 format) Door Compatibility: 40mm-110mm door thickness, 16mm-45mm peephole diameter Operating Temperature: -20 to 55℃ Languages: Simplified Chinese, Traditional Chinese, English, Russian Ringtones: 4 selectable chord tones Volume Settings: High, Medium, Low