Products are shipped according to the color or size of the main image on the product page. Color: 1pcs Compatible & Google Home: Simply use your voice to control connected devices with Alexa or Google Home. It can also be automatically controlled with other smart devices compatible with smart life. It is convenient for you to detect your doors, windows, cabinets, drawers or anywhere you want when they are opened or closed. Enjoy your smart life: When you leave home, it will push notification message to you when the door/window is opened or closed, so that you can find the intruder in time. Plus, you can share the device with your family and track the history of sensor activity. EASY TO INSTALL: No complicated installation tools required. Install the sensor with double-sided tape or screws (included) in just a few steps, and download the app "tuya" or "Smart Life" from GooglePlay or App Store to check the status of your door/window. Specification: Input voltage: DC3V LR03 Quiescent current: 10uA Alarm current: 160mA Low Power Brownout: 2.7V Magnetic control distance: 15mm Working temperature: -10-50 Working Humidity: Max 95%RH Package contains: 1*sensor 1*instruction