This is the Thunderbird 18 Brushless Speed Control. Not recommended for use in helicopters. Castle Creations recommends their Phoenix series of ESCs for heli use. ** Futaba users may have to reverse throttle direction.** **Please consult radio manual on how to make this change.** FEATURES: Easy to use Advanced automatic software features Rugged Surface Mount Technology hardware Simplified programming steps Auto-LiPo and No Brake for 3D action right from the package Universal Rx connector Programmimg features: Brake ON/OFF LiPo, NiMH, NiCd and cutoff Motor reversing One year warranty INCLUDES: One Thunderbird 18 Brushless Speed Control REQUIRES: Connecting to motor, battery and receiver SPECS: Input voltage: 2-3 LiPo cells 5-12 cell NiCd Continuous amps: 18A mcw 9/15/05 ir/jxs