The CPT-900 is a Class 1 / 2 ELT providing 121.5 MHz, 243 MHz and 406 MHz transmissions designed to meet the performance and environmental requirements of specifications Cospas-Sarsat C / S T.001 & EUROCAE ED-62A: and technical standards EASA ETSO 2C-91a & ETSO 2C-126, and FAA TSO-C91a & TSO-C126.