[Tuya Smart Gas Detector] A necessary hub to pair with smoke detectors and various smart products, the Tuya Wireless Gateway Hub is designed for comprehensive home safety [Real-Time Gas Leak Detection] Instantly alerts users with an on-site alarm when gas leakage levels reach the alarm threshold, while also sending notification alerts to connected smartphones [App Push Notifications and Control] Compatible with Smart Life and Tuya apps, the device can detect gas or smoke-related hazards, promptly notifying users on their smartphone for real-time awareness and response [Easy Installation and Broad Application] Widely used in traditional fire prevention systems, it is also effective for air leak prevention, acting as a real-time visual and audible alarm system for whole-home safety [Real-Time Gas Concentration Display] View the real-time gas concentration values via the Tuya app, offering a clear and immediate understanding of gas levels Specifications: Operating Temperature: -20℃ to 85℃ Operating Voltage: 5V Operating Current: 10-496mA Size: 100 x 100 x 3mm Power Supply: USB 5V/1A Material: ABS Weight: 120g Measurement Range: 0-20% LEL (concentrations above the LEL threshold trigger an 80 dB alarm) Reference Levels: 4-8% LEL: Mild headache, fatigue 8-15% LEL: Headache, nausea 15-20% LEL: Dizziness, seizures, life-threatening