Specification 2.4GHz FHSS Dimensions 39x26x10mm Weight 8.0g Frequency 2.4GHz S-FHSS Use 3PRKA/2PL/3PL/4PL operating voltage 4.8 - 7.4VThis receiver does not work with the Futaba FASST system. Use only with Futaba 2.4GHz FHSS system. Futaba FASST systems and FHSS systems are not compatible with each other.