PMR446 is a type of radio communication system that operates on the 446.00625 – 446.19375 MHz frequency range. It is commonly used for short-range communication, with a typical range of up to 3 kilometres. PMR446 radios are widely available and do not require a license to operate, making them popular among individuals and small businesses.PMR446 radios use a set of 8 channels, each with a bandwidth of 12.5 kHz. This allows for multiple users to communicate simultaneously without interference. The radios are equipped with a fixed antenna and have a maximum power output of 500mw. They are designed for simple communication, meaning that users can transmit and receive messages, but not at the same time.