Futaba 4PLS 4-Channel T-FHSS Telemetry System Futaba 4PLS 2.4GHz T-FHSS Computer Radio System with R304SB 4-Channel Telemetry Receiver Telemetry for Temperature, RPM, Rx Voltage, external voltage Read and display four critical racing data as you drive; record them for later reference Ergonomically designed grips enhance the feel of your radio Includes transmitter and receiver only; servos and telemetry sensors not included