... ,increase the satisfaction of cleint . Y-310B/433 guest calling systemOur wireless calling system is widely used in Restaurants ,Hosptial ,Cafes , Internet ... Centers , Fitness Centres ,Offices ,Childcare Centres ,Clubs & Casinos , Hospitals and Medical Centers.. Combinations : wireless receiver +transmitters (call button ) +repearters (optional ) ... :420mm x 152mm x 40mm Y-310B/433 guest calling system