Castle Creations PHX Edge Lite 75 Amp Electronic Speed Controller with 5 Amp BEC Input Voltage: MIN 2S LiPo MAX 8SLiPo BEC voltage (voltage regulator for powering radio and servos): User selectable choice from 5 to 8.4 volt output Max continuous amperage at full throttle: 75 amps Data Logging USB Programming and firmware updates with Castle Link USB Adapter (free coupon enclosed) and Windows based PC