It is a base station for wireless connection that can operate on the 1.9 GHz and 2.4 GHz frequencies. The range distance is approximately 3,200ft (1,000 m). This base can operate up to 5 beltpacks in a single system. It is also possible to upgrade the base to receive 20 more beltpacks through the Upgrade (FSII-BASE-5-UG). The base station can be used in main station mode to talk to any of the channels or change to call mode to speak with a specific beltpack, you can also track each Beltpack through the digital screens in the main base of the system. The station allows you to expand its coverage range through external antennas, it can handle up to 10 antennas (each antenna supports 5 Beltpacks).