The doorbell button can't use separately, it works well with home alarm security system.One button simple design and touch press, easy to operate.Most important, improve working efficiency,Save labour cost,Improve service image. How we use the wireless calling system:First, the calling buttons are pasted or put or on the table, when the guest have any service, he or she press the calling buttons, the receiver (LED screen or watch pager) get signal with vibration or sound, showing the table number, then the waiter know which table to be served.