On a construction site, in a warehouse or companies with large premises, walkie-talkies are very useful. They offer many advantages, such as free calls, calls made immediately without dialling, or independence from telecommunication networks (GSM, 3G, Wi-Fi, etc.). Depending on your needs, you will be able to acquire semi-professional or professional models, which differ in scope, robustness or available functions and accessories. “Hardened” devices are also available for the most extreme uses.
Note that this article does not deal with licensed professional walkie talkies whose use is subject to specific frequency allocation. More powerful, they can communicate by meeting certain military or protection standards.
How Often Will Walkie Talkies Be Used?
Depending on whether your use will be occasional or daily, this will affect the quality of the devices you choose. In the first case, semi-professional models or leisure will be very suitable, with their very affordable price and useful features. In the second, it is necessary to consider acquiring models with Li-Ion batteries (Lithium-Ion) that allow a service life close to 20 h, against a dozen hours for NiMH batteries (Nickel-Metal Hybrid). You will have to opt for the best walkie talkies for that reason.
Under What Conditions Will They Be Used?
If walkie-talkies are intended to be used in challenging environments, on a construction site, for example, and they must be protected from dust or water, then it is imperative to opt for models meeting specific standards of resistance.
What Is The Confidentiality Of Communications?
If communications via walkie-talkies are confidential, then it will be essential to opt for devices with advanced security features such as voice scrambling.
The Main Criteria for Choosing Walkie Talkies
To communicate with each other, walkie-talkies use the frequency PMR446 (Professional Mobile Radio). The number 446 indicates that the rate used is 446 MHz, located in the so-called UHF (Ultra High Frequency). To be precise, know that part of this frequency is reserved for free communications, equivalent to 8 channels. The maximum transmits power allowed on these channels is 500 MilliWatts (0.5 W).
This is a data that is entirely random and strongly depends on the environment in which walkie talkies are used. In urban settings, the range of transmissions ranges from 500 to 1500 m depending on the density of obstacles. The PMR446 frequency has the advantage of good penetration into reinforced concrete; however, in a vehicle, the range is significantly reduced. In the natural environment (except places completely cleared like the sea!), One should expect a scale of 3 to 4 km maximum and this, regardless of the indications of manufacturers who are often very optimistic.