"RS-SAT100" is a text chat application for ICOM "IC-SAT100" and "IC-SAT100M" satellite communication transceivers. It provides a text chat function through a satellite communication network by connecting to a transceiver using Bluetooth. Device requirements: - Android 7.0 or later - The Bluetooth function Supported transceivers: Icom IC-SAT100 and IC-SAT100M Refer to the instruction manual for details. NOTE: The RS-SAT100 is not guaranteed to work on all Android devices. It may not work,