Retekess TD156 Pagers for Restaurants,Wireless Paging System,IP67 Waterproof Buzzer,Timeout Reminder,10 Beepers for Clinic,Food Truck,Medical Office

* IP67 waterproof pager; sealed silicon rubber ring; dust-proof and fall-proof; the beeper will not damage after meet water; safer and more durable * The label paper of the buzzer can be replaced with your own business logo; restaurant can also promote own business while managing the queue * Built-in 3.7V 500mAh rechargeable lithium battery; standby time is up to 48 hours; no need to charge frequently * Using FM modulation technology; the signal is stronger and more stable; transmit up to 1968-2625ft in open area * Vibration; buzzer; LED flash any combination;prompt time 00-99s adjustable;service countdown reminder time can be set from 0-99min;meet the needs of different occasions