








🔐 Secure your space, smartly and silently.
The Onvis Thread-Enabled HomeKit Door Window Contact Sensor is a compact, wireless device designed exclusively for iOS users to monitor door and window status with instant alerts. Featuring Thread technology for faster, more reliable communication, it integrates seamlessly with Apple HomeKit to automate your smart home environment. Powered by a long-lasting CR2 lithium battery, it offers up to one year of standby time and prioritizes user privacy by avoiding cloud storage or tracking. Ideal for home, office, or warehouse security, it also provides 30-day activity logs accessible via the Onvis or Apple Home apps.






| Number of Batteries | 1 CR2 batteries required. (included) |
| Voltage | 3 Volts |
| Control Method | Voice |
| Noise Level | 75 Decibels |
| Mounting Type | Door Mount |
| Sensor Technology | Contact Sensor |
| Size | 2 |
| Manufacturer | Onvis |
| Part Number | CT3--2 |
| Item Weight | 2.39 ounces |
| Product Dimensions | 1.18 x 1.81 x 0.59 inches |
| Item model number | CT3-N |
| Batteries | 1 CR2 batteries required. (included) |
| Style | modern |
| Included Components | Pads |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Lithium Metal |
| Description Pile | Lithium |
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