Functionally similar to the Iridium 9505, the Iridium 9505A introduces some minor product changes. It is significantly smaller, lighter and more resistant to water, dust and shock than the original Iridium 9500 and is ideal for industrial or rugged conditions, yet appealing to the traveling professional. Business, adventure, or pleasure, you can stay in touch across seas and time zones, in remote locations and on the go. One telephone number, through the use of a mini personal subscriber identity module (SIM) card, can help keep you connected.