The history of call bells in South Korea can be traced back to the beginning of the 1990s. Daily newspaper Kyunghyang Shinmun introduced the call bell in its “New Technology, New Product” column on May 14, 1990. As described by Kyunghyang, it was a wireless device developed by a company called Worldcup. From then on, the device took on different names: a wireless calling device, wireless call bell and wireless chime bell.