The receiver should have a label with the model number. The most common 4 channel receivers sold with the Skysport are R114F and R124F.

Neither is recommended for a fuel powered plane because their range is only about 650 feet. The range issue isn't usually a problem with cars and boats.

If the receiver is not one of these, can you post all info from all of the labels and stickers?


Edit: Sizes of these receivers
R114F
Length: 1-1/4" (31.75mm)
Width: 1/2" (.02mm)
Height: 7/8" (.28mm)
Weight: 0.35 oz. (9.9g)

R124F
Width: .6" (15.7mm)
Length: 1.3" (33.2mm)
Height: .64" (16.2mm)
Weight: .3oz (8.5g) with case