... by just pressing a button. LED receivrt How to work of this system,1. Put the ... wireless, it's very easy to operation, needn't install. Just set the transmitter calling number into the ... check the calling information, and then go to service for the calling customerFeatures of GDH5001, Compatible ... time, or continuous playing4, Recipient Capacity up to 1000 pagers5 Can store 15 waiting service numbers ...