How to write walkie-talkie unit

The quantifier unit commonly used in walkie-talkies is department or station.

But now there are some low-cost machines on the market, and two machines are packed in a box in pairs, which can save costs and reduce the cost of throwing goods. Professional walkie-talkie refers to the walkie-talkie with transmission power of 4-5W and frequency range of 136- 174MHz or 400-480MHz. The communication distance of this kind of walkie-talkie is generally between 3 and 8 kilometers (depending on the specific environment), which is relatively simple to operate, because most professional walkie-talkies have no numeric keyboard and only two knobs to control the number of channels, power supply and volume switch. The disadvantage of professional walkie-talkie is that it is relatively large and heavy, but it is more prominent in waterproof, shockproof, anti-fall and anti-aging, and the performance of walkie-talkie is much more stable. Professional walkie-talkies are expensive (500-2500 yuan) and are generally used in construction engineering, property management and factory workshops.