Product: Tokatuker WiFi Door Alarm Sensor Wireless Security Window Open Alert Compatible with Tuya or Smart Life APP MC400
Brand: Tokatuker
Specification:
Battery:AAA1.5V x 2 (Batteries not included)
Standby current:<10uA 
Alarm current:<160mA
Low power alert:<2.7V 
Protocol: IEEE 802.11b/g/n 2.4GHz 
Operating Temperature: -10℃-40℃ (14degF-104degF) 
Operating Humidity:20%-85% 
Standby time:6 - 12 months 
Size: Sensor:70x24x16(mm)/ Magnet:40x15x16(mm)Make sure you get the notifications on time. Please search for "how do I enable push notifications for an app?",and go into the app settings of your phone to make sure that they were all turned on and they were.    Warm tips:
Steps about opening the sound of the door sensor:
1. Please open the app, click”me”,then click”setting”, open “sound”.
2.please find the following in you phone: "notifications">"the app"> open "sounds".
Then you will hear the sound~  
Door Alarm Sensor:Instant notification to your phone immediately when door or window is opened or closed, it's great for burglarproof,babyproof...
Easy setup in minutes—without tools or professional installation. Download App and Connect to Wifi. Make sure you get the notifications on time. Please google "how do I enable push notifications for an app?",and go into the app settings of your phone to make sure that they were all turned on and they were.
It's easy to be controlled by Alexa or Google Home. It can also perform auto control together with other smart devices which are compatible with Smart Life or IFTTT.
Easy installation—The sensor can be installed with double-sided adhesive tape or screws(included)
It work at 2xAAA Batteries(Batteries not included). Only for Protocol: IEEE 802.11b/g/n 2.4GHz Wifi,can't work for 5GHz.

Search query: wifi door sensor
Relevance: Exact