School bell (Call me)

Hour Nadini: We suffer a lot from school congestion and difficulty calling the child with the heat of summer and crowding at school gates, Hour Nadini distinguished itself from other alternatives with several features: works for more than 200 meters in open spaces suitable in enclosed spaces in schools and has been tested in enclosed spaces does not require internet or a SIM card it does not contain a camera or any device that activates the children is powered by a battery