Safety arming feature: regardless the throttle stick position, the motor will not spin after battery connected. Throttle calibration: throttle range can be configured to provide best throttle linearity, fully compatible with all market available transmitters. Programmable items: Brake setting: brake enabled / brake disabled. Battery type: Li-xx(Li-ion or LiPo) / Ni-xx(NiMh or NiCd). Low voltage protection mode (cutoff mode): gradually reduce the output power / cutoff the output power. Low voltage cutoff protection threshold (cutoff threshold): low / medium / high. Start mode: normal / soft / very soft. Timing: low / medium / high. Reset: reset all the programmable items to their default settings. Full protection features: low voltage cutoff protection / over-heat protection / throttle signal lost protection.