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Contact SupplierIntroduction SUPREME discreate sound calling system. can be used be school,collage etc.....by using it we can easily go from one places to another.
what kinds of sound does it makes?
It can be used with a remote it's body is made of pvc or sleek materials.
it's is of high quality,its also make more or less sound.
its also has a reset switch or you can reset everthing with one click.
i have a switch or it has a display of 10 users and we also get remote