The walkie talkie is a necessary communication tool for outdoor use, but many people do not know how to comply with the radio management regulations in use, and it is a serious phenomenon to set the frequency without knowing the law.
a. V segment (VHF) frequency 136-174MHz
Segment V is VHF frequency band, with a frequency range of 144-174MHz. It is characterized by good diffraction and weak ability to penetrate buildings, and is applicable to [mountainous areas, plains, open fields].
b. ∪section (UHF) frequency 400- 470MHz
The∪band is the UHF band, with a frequency range of 400- 470MHz. It is characterized by poor diffraction and strong ability to penetrate buildings, and is suitable for [large and medium-sized cities with many tall buildings]. (Of which: 430-440,450-470 is dedicated for railway, and it is illegal to use with or without a license)
∪section is used for cities, and V section is used for wilderness and sea surface. Professional sections can only be used legally with the license of the local (prefecture level) radio management committee, and should be reviewed annually.
Armed police: 350MHz
Coastal use: 220MHz
Amateur use: 433MHz (managed by Amateur Radio Association)