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Version of firmware: V6_1_3
Date of upgrade: 2021.3.30
Firmware designed for: RC6GS V2
Upgrade Content: 
 add Cruise Control System functionCrawler is difficult in controlling the throttle on the downhill slope, 
the cruise control system of RC6GS V2 helps the driver easily set the optimal throttle volume for RC crawler car.
 telemetry display of RSSI and model battery voltage
