The ICOM IC-SAT100 is the ultimate in remote communication equipment allow instantaneous communication across the planet thanks to the Iridium PTT satellite network. Satellite PTT (Push-To-Talk) is a two-way radio system that uses the Iridium® satellite network to communicate instantly anywhere you can see the sky. It can be a communication tool in remote, isolated areas with no mobile phones or landline network infrastructure. Even if terrestrial network infrastructure is rendered unusable by human or natural disasters, Satellite PTT can provide a stable backup, independent from other networks.