... Application:Aircraft Radio Control.eg,Helicopter,Plane,Car,Boat,Tank Radio Control Models Crystal FM72.190Mhz (1)Aeromodeling crystals: mainly ... helicopters, aircraft, remote control cars and tanks ... and other models.(2)It can be adapted different modulation methods, such as ... GWS, .... Application:Aircraft Radio Control.eg,Helicopter,Plane,Car,Boat,TankSystem: AM,FM&PCM.TX, RX, & RDX Crystal