Today's 2.4GHz tech makes dependability possible. Tactic makes it affordable. This is the Tactic TR400 2.4GHz 4-Channel Surface Receiver.
For use with the Tactic TTX490 2.4GHz 4-Channel SLT transmitter
Used in AquaCraft boats
Tactic TR400 2.4GHz 4-ch Receiver
Dimensions: 1.02 x 1.7 x 0.55" (26 x 44.5 x 14mm)