TREX 120a Brushless Sensored V3 turbo ESC Current endurance capability increases 15% compared with V2.0 Perfect filtering effect from smaller size capacitors module The ESC is USB supported. The firmware of the ESC can be updated through an USB adapter on the Advanced LCD Program Box * (3 in 1 lcd programer box not include) This ESC Suitable for : 1/10 rc drift/touring/buggy/monster track etc