You're looking at a mint condition satellite phone with global coverage except the poles. It receives and sends signals via geostationary satellites and land stations around the world. Pre-paid SIM card is included. Credits need top-up for continued use. Comes with the original box, and all the accessories when bought new. Throwing in a Pelican 1200 case which currently houses the phone. Please check out the official Inmarsat website for more technical information. Thank you.