Best Choice for Social Distancing Buzzer Pager System 5 Alert Mode: Vibration, Beeping, Flashing and Various Combination Includes: 48xpagers, 2xTransmitter/Charging base, 2xPower adapter Group Call Without Re-program A built-in 3.7V rechargeable battery in receiver with stacked one piece charging , avoiding the trouble of changing batteries frequently.Battery life:at least 72 hours standby,36 hours in use The revolutionary wireless paging system offered by Nolas Tech provides restaurants, Cafe, food court, clinic, church and auto shop perfect chance to avoid long waiting lines of customers to eliminate crowding, reduce labor cost and thus to improve efficiency and generate more revenue. The long signal range of the device will enable guests to walk around or sit down to have a rest, and thus eliminating the noisy announcements and wasted time. By providing customers pleasant user experience through its high standard of technology and reliable performing stability, this paging system also has a longer lifetime comparing to other pagers. The flexibility of this system will allow user to add additional pager any time.