Q: I have a traxxas 2019 receiver and a transmitter High qualification and 2 servos traxxas 2018 traxxas 1 battery and 2 yellow crystals. In my receiver I have my battery and my two servos in the correct slots.

A: I suppose both the unit uses the same Xtal. Sometimes, the units use a Xtal Xtal xmit and NA. check. Obviously, if the XTAL supplied with the unit and are not marked and xmit NA then u is good to go. If they are sure they are in the right unit.