Fully programmable HOBBYWING Max6 esc with traxxas 2200kv motor. I used it with 6s with absolutely no issues but esc is capable of 8s. system in excellent condition. Well maintained in a traxxas UDR. NEW Upgraded CERAMIC Bearings installed in the motor as well as hot racing aftermarket heat sink for additional cooling. Excellent strong system that rockets a 15 lb rig over 40 mph with ease. Thanks for looking!