CMIIT ID is the type approval code for radio transmitting equipment.
Radio transmitting equipment is defined as all kinds of equipment that transmits radio waves, but does not include industrial, scientific research, medical equipment, electrified transportation systems, high-voltage power lines and other electrical devices that can radiate electromagnetic waves.
Application
A radio transmitter generates an alternating current that acts on an antenna. The antenna generates radio waves and sends them into space. In addition to their application in radio broadcasting, radio transmitters are widely used in a variety of devices that utilize radio for communication.
Common applications include cell phones, wireless LANs, Bluetooth, wireless walkie-talkies, and more.