Light Sensor connects to compatible gateway and supports open-source gateway integration Supports APP control When connecting via APP, set region to China Mainland Functions as a Light Sensor, Brightness Sensor, and Automation Smart Detector via APP Product Name: Smart Button Working Range: 25m in open area Power Input: CR2450 button battery (estimated lifespan: 5 years at 20 uses per day) Operating Temperature: -10℃ to 45℃ Color: White Material: ABS Package Contents: 1 x Switch 1 x Double-sided tape 1 x Instruction manual in Chinese and English The package includes only the items listed above; other items are not included Note: Lighting conditions and monitor settings may cause slight color variations between the product image and actual item. Measurement tolerance: ±1-3cm