Retekess TD158 Calling System Restaurant, 30 Permone System, Outdoor 500M, LED Tube Display, 4 Call Modes, Talk Time 1-250s, Pager Restaurant, Food Truck, Hotel, BarRetekess TD158 Pager Call System, 30 Restaurant Pager System, Outdoor 500M, LED Tube Display, 4 Call Modes, Talk Time 1 250s, Gastro Pager for Food Truck, Hotel, Bar Large capacity of 30 pagers; the large capacity allows for peak moments; Additional restaurant pagers can be added constantly to meet the needs of business growth Adjustable prompt modes; the beep of the pager is divided into four levels: quiet, low speed, medium speed and fast; suitable