... service, bill and cancel key.GDT-05Y/B have service,water,order, bill and cancel key.Physical Dimension:120x85x55(mm) Weight ... .4kg(With battery, stand)Control:5 call buttons(Service, order, water, bill, cancel)Outer Material: high-density ABS enginee plasticKey Material ... in wherever. wireless service call button for restaurant,KTV,pub, Spa