ASY-99 2.4 inch High Definition Smart Cat Eye Home Electronic Video Doorbell Details: 1. Material: plastic, alloy 2. Screen size: 2.4 inches 3. Weight: about 300 grams 4. Lens pixels: 1 million 5. Dimensions: host 11x7.4x1.8 cm, camera 6x6x1.5 cm 6. Viewing angle: 120 degrees 7. Recording mode: taking photos 8. Power supply: 3 x AAA dry batteries (need to purchase by yourself) 9. Applicable door hole diameter: 15-50 mm 10. Applicable door thickness: 35-105 mm 11. Applicable scenarios: family, villa, factory 12. Note: Expansion memory card is not supported, without PIR function (without automatic capture function) Features: 1. Built-in memory, circular storage, no need to insert a memory card 2. Press the doorbell to take pictures and record visitors, which is safer 3. 2.4-inch display, 1 million high-definition pixels, more clear shots 4. With infrared night vision function, it can also record at night 5. 120 degree wide-angle field of view, recording more clearly 6. Alloy material, anti-theft and anti-theft 7. 3 kinds of polyphonic ringtones, easy to set, easy to install, and widely applicable