This is the Thunderbird 36 Brushless Aircraft 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 36 Brushless Speed Control REQUIRES: Connecting to motor, battery and receiver SPECS: Max amps: 36A Max volts: 15V, 3S LiPo, 10 NiCd/NiMH BEC: Linear regulator, 3A max Length: 1.5" (38mm) Width: 1" (25.4mm) Height: .35" (9mm) Weight: .7oz (20g) Brake: ON/OFF tlw 5/25/07 ir/jxs