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DDDV002
D&D Hardware
Brass / Zinc Alloy, Glass Lens
Black, Silver, Gold, AB, AC, etc.
hotel, apartment, commercial, office
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A traditional door viewer, also known as a classic peephole or optical door viewer, is a non-electronic device installed in doors to enable occupants to observe exterior areas without opening the door. It features an optical lens system, typically a fisheye (wide-angle) lens, which functions similarly to a reverse telescope to provide a broad, clear view of visitors or surroundings outside. This design ensures one-way visibility—allowing those inside to see out while preventing outsiders from peering in, thus safeguarding privacy. The device operates purely through optical principles, requiring no batteries, wiring, or electricity. Constructed from durable materials like metal or plastic with a glass lens, it is weather-resistant and designed for long-term reliability. Its simplicity, low maintenance, and effectiveness make it a common choice for residential and low-security applications where basic visual verification is sufficient.
A traditional door viewer, also known as a classic peephole or optical door viewer, is a non-electronic device installed in doors to enable occupants to observe exterior areas without opening the door. It features an optical lens system, typically a fisheye (wide-angle) lens, which functions similarly to a reverse telescope to provide a broad, clear view of visitors or surroundings outside. This design ensures one-way visibility—allowing those inside to see out while preventing outsiders from peering in, thus safeguarding privacy. The device operates purely through optical principles, requiring no batteries, wiring, or electricity. Constructed from durable materials like metal or plastic with a glass lens, it is weather-resistant and designed for long-term reliability. Its simplicity, low maintenance, and effectiveness make it a common choice for residential and low-security applications where basic visual verification is sufficient.
