Computer-readable instructions, when executed by a processor of a terminal device, may cause the terminal device to: repeatedly execute a first-type communication process using first-type communication via Internet, wherein the first-type communication process is for receiving related information which is related to a communication device; and repeatedly execute a second-type communication process using second-type communication not via the Internet, wherein the second-type communication process is for receiving the related information. A first interval for repeatedly executing the first-type communication process may be longer than a second interval for repeatedly executing the second-type communication process.