Professional grade two way radios include both marine Radio Frequency and national coverage. Professional two way radios have more special functions and are more practical in specific industries.
Intrinsically Safe Two Way Radios are designed and guaranteed to not create a spark when dropped nor to emit an electrical charge when in operation.
Marine VHF radio equipment is installed on all large ships and most seagoing small craft. It is also used, with slightly different regulation, on rivers and lakes. Marine radio allowing ships to keep in touch with shore and other ships, and send out a distress call for rescue in case of emergency. It uses FM channels in the very high frequency (VHF) radio band in the frequency range between 156 and 174 MHz, inclusive, designated by the International Telecommunication Union as the VHF maritime mobile band.
Two Way Radios in this category work using cellular towers and Wi-Fi to provide national coverage. These walkie talkies work anywhere there's a cellular signal which is over 93% of the United States.
Dual-Way Counter Interphone Audio Anti-interference Window Intercom System.