A radio walkie-talkie designed and manufactured to meet the needs of radio enthusiasts. This kind of walkie-talkie can also be called "playing machine", and fans who play walkie-talkies are called "HAM" or "ham". Due to the limited frequency range of radio intercom equipment, the environmental conditions and usage requirements of the radio intercom are different from those of professional walkie-talkies. The main feature of the amateur machine is that it has a small size, complete functions, and frequency scanning. The frequency can be directly set on the panel and the frequency point is displayed on the panel. Its technical specifications, equipment stability, frequency stability, reliability and working environment are also worse than professional radios. The direct result is that the cost of amateurs is also lower to accommodate the needs of individual purchases.
For this amateur personal radio service, each country has opened up a dedicated frequency band for use by amateur radio enthusiasts. The frequency bands opened in China are 144?146MHZ and 430~440MHZ, which are also commonly used in countries all over the world. In October 2001, the National Radio Administration of the Ministry of Information Industry issued the "People's Republic of China Radio Frequency Plan" for amateur radio enthusiasts and amateur services. "Amateur service: for amateur radio enthusiasts to self-train, communicate and Radiocommunication services for technical research. Amateur radio enthusiasts refer to those who are formally approved and interested in radio technology. Their interests are purely personal hobbies and do not involve profit."
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