Product is shipped based on the color or size of the main image on the product page. Smart WiFi Door Sensor Door Open / Closed Detectors Wifi Home Alarm Compatible with Alexa Google Home. The current of our wifi door detector will be around 40uA but detectors from other brands will operate at around 7.9mA. 1mA=1000uA. The less working current the longer the battery will work. Please watch the video and you will see that our detector works in low power mode. You won't need to replace the battery often. Attention: This device is designed for tuyasmart/smart life application. You can set it to control another smart device. You can check the detector status in alexa/ifttt app but it can't control other alexa/ifttt devices. Compatible with Alexa Google Home: Use just your voice to control connected devices by Alexa or Google Home. It can also perform automatic control with other smart devices compatible with Smart Life or IFTTT. Convenient to detect your doors windows cabinets drawers or anywhere you want to be notified when it's open or closed. 1. Due to different monitors and lighting effects the actual color may be slightly different from the picture. 2. Due to manual measurement please allow 1-3cm deviation Supply: 2 AAA batteries (batteries not included in delivery) Size: as shown Shipping color: white Shipping quantity: 1 set.