The receiver antenna is 28" long its supposed to be used as a range upgrade for a tc31 or sw36 but it still has no range and it doesn't have it's own batterys it is on a BEC (battery eliminator circuit) which means that a small amount of current is siphened off the main battery and given to the receiver to power it one drawback to that is if you have to come in from long range on low power your servo has brely enough torque to turn the rudder and your at risk of going out of range so maybe this thing is just a piece of junk[
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