Firmware release HP21001 for the Iridium Extreme PTT, with the download and step-by-step install instructions. The Extreme PTT works like a global walkie talkie. One press reaches an entire talkgroup anywhere on the planet, in a handset built to MIL-STD 810F with an IP65 rating.
Related product: Iridium Extreme PTT
Visit Satmodo to purchase your own Iridium Extreme 9575 PTT
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