In most cases users use licensed frequencies either in the UHF or VHF bands. In certain areas licensed frequencies may be reserved for a given user, thus ensuring that there is less likelihood of radio interference from other RF transmitters. Also licence free frequencies are available in most countries, enabling easy implementation, but at the same time other users may use the same frequency, thus making it possible that a given frequency is blocked.
Typically, users rely on licensed frequencies operating within the UHF or VHF spectrum. In certain areas, these frequencies are reserved for a specific user, minimizing the risk of radio interference from other transmitters. Furthermore, unlicensed frequencies are widely available, making implementation straightforward; yet, this may result in conflicts where multiple users share the same frequency, potentially rendering it unusable.