Standard license-free two-way radios have limited range of a few kilometers whereas PoC (PTT over Cellular) radios connect to the GSM network for national coverage. POC radios are also digitally encrypted for secure private, clear and instant communications. The Zartek ZA-PT3 PoC Two Way Radio connects to an Internet Network (IP internet Protocol) via a data SIM card (3G/4G GSM) inserted in the side or via Wi-Fi. Note: SIM card is not included. Use Vodacom or MTN for best coverage and any SIM should work but may need manual APN settings input via the buttons. 2GB per month is more than sufficient. Coverage is country wide and will depend on network availability. The ZA-PT3 links to a Server Platform, called ZartekPTT where all calls are directed through. Most platforms charge an annual fee to gain access to the platform but the ZA-PT3 price includes a once-off activation fee for the lifetime of the device, which is far more convenient and cost effective. This once-off activation allows the radio to be ready whenever needed as long as data is available. 100 general use channels / group are preloaded in the device for temporary initial use. After purchase, insert a SIM card, select an empty channel and begin communicating. Follow the included instructions to customize your own private setup. Zartek can remotely set up your own groups and radio names. Communication between radios is quick and can be PTT (push to talk) to groups or PTT or IP telephone Call to a select individual. TTS (text to speech) messaging is also featured. Optional Cloud Dispatcher access using a web browser on PC, laptop or tablet is available to contact single or groups of radios, monitor many groups, view GPS map positions, historical tracking and audio recordings. Enquire in store for Dispatcher access. This radio is robust for heavy duty applications such as construction, mining, security, farming, events, filming and transport. It is recharged using a standard USB charger. High strength materials and quality components have been used in the manufacture of this two-way radio to give many years of use. It is designed for rugged outdoor and industrial use to excel in tough environments.