This is a Hitec AM/FM 72MHz Dual Conversion Receiver Crystal. FEATURES: Replaces or changes the frequency crystal of a receiver. This is used for Hitec radios on Channels 11-60. INCLUDES: One AM/FM 72MHz Dual Conversion Receiver Crystal. Two "For Airplane Use Only" Stickers. REQUIRES: An AM/FM 72MHz Dual Conversion Hitec Receiver. COMMENTS: For an AM/FM Single Conversion Receiver Crystal, use HRCL23**. DO NOT attempt to use this crystal (HRCL01**) with a single conversion receiver, those require a Single Conversion Receiver Crystal, HRCL23** JAL 3/2/00 ir/jl