Radio: 3-channel 2. 4ghz fhss with dual-rate steering and throttle, transmitter includes charge jack for optional nicd batteries. Servo: high-output ball bearing, metal gear, digital servo with 18kg-cm torque. Motor: 3900kv brushless, 4-pole with ˜36mm outer diameter and ˜3mm shaft. Esc: hobbywing 60a waterproof esc featuring single deans plug battery connectors, cooling fan, and program card. [features] all metal parts cnc machined. Get ready for the ultimate in performance and durability with the hyper tt 2. 0! (hb-tt2e-c60sv)