Enhanced with an intelligently designed Push-to-Talk mode, extended battery life and expanded loudspeaker, the Iridium Extreme PTT handset has been ruggedly engineered to support high intensity users of the truly global Iridium PTT voice dispatch and communications service. When PTT communications are not required, users can easilly switch modes to access all of the regular satellite telephony services enabled by the Iridium Extreme 9575 satellite phone. Features...