Sanwa RX-47T 2.4GHz FHSS-4 4-Channel Telemetry Receiver.
Features:
Specifications: Frequency: 2.4GHz FHSS4 Channel: 4CH Nominal Input Voltage: 3.7-7.4V Dimensions: 30.0x23.3x14.0mm Weight: 6.6g Compatible radio: M12S, M12, EXZES ZZ, EXZES Z, MT-4S, MT-4 (non-Compatible with SSL), MT-S