Futaba T4GRS 2.4GHz T-FHSS 4-Channel Combo Including R304SB With TelemetryFutaba T4GRS 2. 4GHz T FHSS 4 Channel Combo Including R304SB With Telemetry FUT05003095 3 The new 4GRS system is Futabas first stick Car Boat set for some time, but is well worth the wait, being feature packed and optimised for the serious racer. As the name suggests the system offers 4 functions, and of course includes Futabas renowned telemetry system, which is a huge benefit for practice and whilst racing, (where allowed). Both S FHSS and T FHSS