Feature Highlights: 1. Works with Smart Home Systems – Connects easily with other smart devices through the Zigbee gateway. No need for batteries during the first year of use. 2. Easy to Use – Ready right out of the box. No tools or complicated setup required. 3. Built to Last – Moisture-resistant design and reliable manufacturing ensure steady performance in different environments. 4. Quick & Accurate Alerts – Faster response time when doors or windows open or close. Detection accuracy is within 5mm. 5. Wide Compatibility – Pairs with the Tuya Smart or Smart Life app, letting you monitor your home from anywhere. Product Details: This smart contact detector helps keep your home secure by instantly notifying you when doors or windows are opened. It uses Zigbee 3.0 technology for a stable connection and works with a compatible Zigbee gateway. The sensor runs on a long-life battery (1 year under normal use) and operates reliably in temperatures from -10°C to 45°C. Its compact, white ABS housing blends neatly into most interiors. Specifications: - Gateway/Hub Required: Zigbee gateway (Tuya compatible) - Operating Voltage: 2.3–3.3V - Battery: 3V CR2032 (included, lasts up to 1 year) - Detection Accuracy: