The Airtronics MT-4S Super 2.4GHz FH4T 4-Channel Telemetry-Capable** Radio System w/RX-472 Super Response Receiver & Sanwa Synchronized Link. The MT-4S Super builds on the original MT-4 by adding Sanwa Synchronized Link support, decreased response time (same as the M12), a new backlit LCD, RX-472 Super Response receiver and updated steering wheel and graphics.Telemetry Capable Airtronics receiver required (RX-461 or RX-462) for full Telemetry capability.