Spektrum RC SR6100AT 6-Channel 2.4GHz DSMR Surface Receiver with Telemetry & AVC SPMSR6100ATDetails: The Spektrum SR6100AT 6 Channel 2. 4GHz DSMR Surface Receiver was built around frequency agile DSMR technology to deliver superb range and response, especially in places where multiple 2. 4GHz systems are in use at one time. SR6100AT features patented Spektrum AVC (Active Vehicle Control) and full range telemetry capabilities. AVC Technology reads your control inputs, senses your car's direction, and makes as many as 180 steering and power