マダイルヨ

This app will sound an alert if the parent's smartphone moves away from the car and the child.
After installing the app, register two dedicated beacons.
To use the two beacons, attach one to the car and the other to the child.
After launching the app, the farther the beacons are from the smartphone, the weaker the wireless signal will become.
An alert will sound 3 to 5 minutes after the wireless signals from both beacons have been completely lost.
When the alert sounds, press the confirmation button on the pop-up.
If you do not press the confirmation button on the alert pop-up, an alert will sound after 1 or 2 minutes.
The timing of the wireless signal loss varies depending on the environment.
While the app is generally designed to run in the background, there are cases where the smartphone's OS may forcibly shut it down, so please check that the app is running occasionally.
Depending on the location, an alert may sound due to radio interference.