This unit is competely compatible with all kind of walkie talkie, the two systems work together to give total coverage of foot-operatives and vehicle-mobile unit. Good for 1. Tracffic wardens 2. Road construction gangs 3. Council workers(e. G. Cleaning operative etc) 4. Postal employees 5. Military personnel. 6. Security guards 7. Car park management 8. Polic surveillance 9. Anybody who wants to manage their operatives more effectively.