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🔐 Stay connected, stay secure—without the hub hassle!
The Onvis Thread-Enabled HomeKit Door Window Contact Sensor is a compact, wireless security device designed for seamless Apple HomeKit integration. It delivers instant, low-energy alerts when doors or windows open, supports smart automations, and offers a year-long battery life with CR2450 power. With privacy-first local data handling and a 30-day activity log, it’s the perfect upgrade for millennial professionals seeking smart, reliable home security without the clutter of hubs or cloud dependencies.








| ASIN | B0BXP613WN |
| ASIN | B0BXP613WN |
| Audible Noise | 75 Decibels |
| Batteries | 1 CR2 batteries required. (included) |
| Battery Description | Alkaline |
| Best Sellers Rank | #34,953 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #47 in Home Security Door & Window Sensors |
| Brand | Onvis |
| Built-In Media | 2*Onvis Smart Door & Window Sensor1* adhesive backing 1*user manual 1*Reset pin |
| Color | white |
| Compatible Devices | HomeKit-enabled Apple devices |
| Control Method | App |
| Country of Origin | China |
| Country of origin | China |
| Customer Reviews | 4.0 4.0 out of 5 stars (59) |
| Customer reviews | 4.0 4.0 out of 5 stars (59) |
| Date First Available | 14 May 2024 |
| Item model number | CT3-N |
| Manufacturer | Onvis |
| Manufacturer | Onvis |
| Manufacturer Warranty Description | 1Year |
| Mfr Part Number | CT3--2 |
| Model Number | CT3-N |
| Mounting Type | Door Mount, Window Mount |
| Number of Batteries | 1 CR2 batteries required. (included) |
| Power Source | Battery Powered |
| Product Dimensions | 3 x 4.6 x 1.5 cm; 68 g |
| Sensor Technology | Contact Sensor |
| Size | 2 |
| Unit Count | 2.0 Count |
| Voltage | 3 Volts |
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