DX3S control has this function
I am planning to sell mine
Key Features
•Now compatible with the MR3000 3-channel marine receiver and DSM2 surface receivers, in addition to DSM surface receivers.
•Integrated telemetry with graphically depicted gauges on transmitter (requires DSM telemetry compatible surface receiver)*
•10-model memory
•Includes free bonus SR300 3-channel DSM sport receiver
•Monitor your engine or motor’s operating temperature in either Fahrenheit or Celsius
•Never let a low battery stop you in your tracks – the DX3S and integrated telemetry let you watch over your receiver pack’s voltage to keep you in the running•Keep tabs on your engine’s operating range-safe high-rev operation
•Rolling selector user interface for fast, easy programming and setup
•10-character model naming
•3 grip sizes (small, medium, large)
•Adjustable Frame Rate: 11 or 16.5ms
•ModelMatch
•Expert and standard modes
•Digital trims
•Throttle Punch
•Steering dual rate
•Travel adjust
•Sub trims
•Servo reverse
•Exponential
•3-timer functions
•Aux/Steering channel mixing
•Telemetry alerts
•Buzzer adjustments - high, low & off
•Screen contrast
•Transmitter battery alert
•Right-hand configuration (only)
* The typical telemetry range is 100–200 feet and will vary depending on the operating environment