Retekess TD167A Restaurant Pager System, Rugged Buzzer, 1640ft Long Range, Independent Coding Slot, 25 Hours Standby Time, 20 Coaster Pager for Food Truck, Church, Nursery

["Independent coding slot; new experience supports one key programming; quickly change food pagers buzzer number","Out of range reminder; if customers leave the set range;the restaurant buzzer pagers will trigger an alarm to remind them to return","Long work distance; restaurant buzzer system in open air working distance is up to 500m/1640ft","Multiple prompt modes; buzzer; vibration and light are optional; you can choose the prompt mode according to the environment","Built in battery; restaurant pager system fully charged; standby time is about 25 hours"]