POC SIM card PTT network radios have below advanced features (5C):1) Coverage -LONG DISTANCE talk even WORLDWIDE, Repeater no needed.2) Capacity-can have many groups talk at the same time.3) Compatibly - Can send SOS to the PC dispatcher. 4) Control- Can be GPS tracked, Monitored, Recorded by a PC dispatcher. 5) Cost-effective as a total solution: Radio terminal, PC dispatcher & Smartphone APP.

collect back overdue from term customer