Genuine Futaba spare/option part.The R304SB is a compact light weight 4 channel receiver using T-FHSS telemetry. Suitable for HV applications the R304SB has an operating voltage range of 3.6 up to 8.4v.T-FHSS is a variation of Futaba's FHSS technology with the added bonus of telemetry. As standard the receiver will monitor its own voltage and transmit that back to your T-FHSS transmitter. There is also a S.Bus2 port included allowing you to plug in additional futaba telemetry sensors.Note:When using 7.4 V LiPo batteries as a receiver battery, the connected servos must also be designed for this voltage. The receiver does not have an internal voltage transformer for the servo voltage! Features: 4/4-channel T-FHSS 2.4 GHz telemetry receiver with S.BUS2 Telemetry function with 32 channels S.BUS2 output Hi-VoltageSpecifications: Frequency band: 2.4 GHzTransmission system: T-FHSSNumber of channels: 4 PWM / 4 S.BUSS.BUS-port: S.BUS2Voltage range: 3.7 - 8.4VDimensions: 35 x 23 x 12 mm Weight: 6.7 gContents:1 piece

Genuine Futaba spare/option part. This Futaba R304SB-E is very similar to the R304SB (FUTL7680) in that they both feature 4-channels, both feature S.Bus2, both are Telemetry enabled and both cost roughly the same price.However, the two receives differ in two fundamental areas: this R304SB-E is only intended for electric vehicles, the R304SB is electric/nitro/gas, and this R304SB-E features the benefit of having a non-exposed built-in antenna - the R304SB is fully exposed.Features:T-FHSS SystemTelemetry Enabled4-ChannelsBuilt-in Hidden AntennaElectric Vehicle Use OnlySpecifications: Futaba System: T-FHSS S.Bus2: Yes Channels: 4 Range: 70m (230ft) (at best conditions) Power Requirement Rated Voltage: 4.8-7.4V Usable Voltage: 3.5-8.4V Size: 1.38x0.91x0.33" (35.1x23.2x12.5mm) Weight: 0.23oz (6.7g) Contents:1 piece