This is the Futaba R304SBE 2.4GHz T-FHSS S.BUS2 4-channel telemetry receiver.Features: Only for use with electric powered RC vehicles, do not use with glow or gasoline powered vehicles Telemetry data can be displayed and checked at the transmitter by connecting the telemetry sensor to the S.BUS 2 port of this receiver Built-in antenna Normal and high-speed mode, normal accepts any type of servos* or the peripheral, high speed mode accepts digital servos, including BLS series and most peripheral equipment such as brushless ESC's Includes: Futaba R304SBE 2.4GHz T-FHSS S.BUS2 4-ch Telemetry Receiver with Instructions Requires: Digital servos of modeler's choiceNote: Not compatible with the Futaba S-FHSS, FHSS, FASSTest or FASST transmitters. For best results do not used analog servos with this receiver. System: T-FHSS system at Normal/High speed mode (auto detection) Specs: Receiving Range: 230' (70m) under best conditionsPower Requirement Rated Voltage: 4.8-7.4VUsable Voltage: 3.5-8.4VSize: 1.38 x 0.91 x 0.33" (35.1 x 23.2 x 12.5mm)Weight: 0.23oz (6.7g)F/S and Battery F/S Function: Sets according to transmitter usedBattery F/S Voltage: Arbitrarily set with transmitter