The call watch for male and female students. Personally tried for my children after suffering from standing at the school gate in the hot sun. Its range is approximately 300 meters. It does not require a SIM card or connection, only a remote control with a watch and a charger. The watch only needs charging, but the remote does not always need it. I keep it in the car. I charge the watch daily for about half an hour. If a blue light appears, it means it is charging. It emits a vibration or an alert sound when the remote is pressed. Then the child comes out upon hearing the tone or feeling the vibration. God willing, you will pray for me after trying it. 100 Riyals