The walkie talkie can make calls without any network support, without incurring any phone bills. It is suitable for relatively fixed and frequent calls, consisting of a shell, host, battery, belt clamp, seat charger, and antenna. There are three main types of walkie talkies: analog walkie talkies, digital walkie talkies, and IP walkie talkies.

Interphone is a terminal device for cluster communication, which can not only serve as a terminal device for cluster communication, but also as a professional wireless communication tool in mobile communication.

The walkie talkie covers a wide range. Here, we will collectively refer to radio communication equipment operating in the ultra short wave frequency band (VHF 30-300 MHz, UHF 300-3000 MHz) as radio walkie talkies. In fact, according to relevant national standards, they should be referred to as ultra short wave FM radio telephones. People usually refer to handheld wireless telephones with small power and size as "walkie talkies", which were previously referred to as "walkie talkies" or "walkie talkies"; A wireless telephone with high power and large volume that can be installed in vehicles (ships) or fixed for use is called a "radio", such as a car mounted station (car mounted machine), a ship mounted station, a fixed station, a base station, a transfer station, etc.

Radio walkie talkies were the earliest wireless mobile communication devices used by humans and began to be applied as early as the 1930s. In 1936, Motorola Corporation of the United States developed the first mobile radio communication product - "Patrol" Radio receiver for AM vehicles. Then, in 1940, it developed the first handheld two-way radio AM walkie talkie with a weight of 2.2 kg for the US Army Signaller, and the communication distance was 1.6 km. In 1962, Motorola launched the first handheld Walkie-talkie HT200 weighing only 935g. Its shape was called "brick" and its size was similar to that of the early cell phones.