Anchor Audio has set out to perfect the concept of a wireless companion speaker that offers dramatically expanded wireless range, increased system capacity, and instant ADA compliance. The AIRs are battery powered, perform 6-8 hours or more on a single charge, and can be placed 150+ feet from the transmitter. One transmitter can connect to an unlimited number of AIR wireless companion speakers. The AIR wireless technology offers 100 user-selectable channels operating within the 900 MHz frequency, which is one of the few clear channel ranges available and therefore limits interference from competing signals. Furthermore, the 900 MHz band offers expanded wireless range for an increased transmission distance. AIR companion speakers can also operate in ‘wired mode,’ which includes simply flipping a switch and plugging in a cable.