Smart WiFi Door Sensor Door Open / Closed Detectors Wifi Home Alarm Compatible With Alexa Google Home Tuya APP The current of our wifi door detector will be about 40uA, but other brand detectors will work at about 7.9mA. 1mA = 1000uA. The less of the working current, the longer battery will work. Please look the video and you will see our detector works at low power mode. You will not need to replace the battery often. Attention: This device is designed for tuyasmart / smart life app. You can set it to control other tuya smart device. You can check the detector status in alexa / ifttt app, but it can not control other alexa / ifttt device. Compatible with Alexa Google Home: Simply use your voice to control the connected devices by Alexa or Google Home. It can also perform auto control together with other smart devices which are compatible with Smart Life or IFTTT. Convenient for you to detect your doors, windows, cabinets, drawers or anywhere you want to be notified when it is opened or closed. 1. Due to different monitors and lighting effects, the actual color may be slightly different from the image 2. Due to manual measurement, please allow 1-3cm deviation Power supply: 2 AAA batteries (battery not included in delivery) Size: as shown Shipping color: white Quantity shipped: 1 set