The Inrico S100 has a compact form with an adequate 2.8 inch display This radio is cellular so works like a walkie talkie but uses the cellular network as a repeater! This means hand held to hand held or handheld to mobile comms around the world. You will need a sim card or ...The Inrico S100 has a compact form with an adequate 2.8 inch display This radio is cellular so works like a walkie talkie but uses the cellular network as a repeater! This means hand held to hand held or handheld to mobile comms around the world. You will need a sim card or otherwise you can use it on Wifi! Using Apps like Zello & Teamspeak you can talk privately for just the cost of your sim! Please note this radio does not transmit on the amateur bands For the Radio amateur you can link to many networks using the International Radio Network.Peanut,Echo Link etc For the non amateur think of it as well behaved CB with worldwide coverage or Private 1 to 1 calls! For the private use all the advantages of cell phone coverage while looking professional Please note this version uses unlocked Android and allows you to fully utilise the PTT functions