This is Airtronic / Sanwa 107A41251A RX-481 BUILT-IN ANTENNA Receiver
2.4GHz FHSS4 / FHSS3 spread spectrum system 4ch
Antenna leadless
Super response (SSR) mode corresponding
Frequency 2.4GHz FHSS4 / FHSS3
CH number 4ch
Power-supply voltage 3.7 ~ 7.4V
Dimension 18.2x24.4x27.1mm
Weight 7.1g
Compatible models
M12, EXZES Z, M11X, EXZES X,
MT-4S, MT-4, MX-3X, GEMINI X