... ,table call,factory good price offer,one system support 35 tables wireless calling system,wireless service system,service button,table call,factory good ... : use one “23A,12V” batttery(battery excluded)Features:This system is a system that customers call to waiter for service.Center Service can ... Center Monitor.It's quite convienent for customers,who won't walk to counter to ask for food/drink,etc,or ...