Portable call; split design is better for pick-up; call; tray distribution; people whose roles are not in one place; suitable for fast food restaurants with multiple window pick-ups ^^ 3 prompt modes; food truck beepers buzzers has buzzer vibration and flash modes; customer can hear the beep sound even at noisy restaurants ^^ 2 types of charging: flexible in use; can be charged from the base on the ground floor; can also be charged by cable in the waiting area on the first floor ^^ 36 Hours Long Service Time; wireless calling system built-in 400mAh rechargeable battery; reduce the trouble of frequent; chargingcan be used for a day's work ^^ Customer can turn off prompt sound; order buzzers for food truck has a close reminder function; customers can turn off the beep after receiving the prompt