Smart Tuya Wifi Door Sensor Door Open / Closed Detectors App Notification Alarm Smart Life Home Security Alarm System   Note:   Batteries are not included because of aviation restrictions.   Functions:   1.Information push   2.Loud Alarm   3.Logs About Sensor   4.Low battery reminder   Get Door Status From APP   90DB Loud Alarm   Door Open And Close Notification   Logs About Sensor   Low Battery Indication   Details:   About our strength:   1.We are a professional manufacturer of alarm equipment.   2,Our products include alarm host, infrared detector, door or window detector, remote control, RFID card, siren, surveillance camera, smoke detector, gas (including carbon monoxide, natural gas, etc.) detectors.   3,Welcome customers to come to our store for consultation.   FEEDBACK:   1,If there is any question about our product or service:   Please be sure to contact our customer service staff first, we are very happy to help you. We will work hard to find the best solution until you are satisfied.   Please don't give us a bad evaluation, which does not help solve the problem.   2,If you are satisfied with our products and services, please leave 5 stars. thank you for your support