400W 220V AC 5-470 RPM Speed Controller Reversible Variable Gear Electric Motor admin December 25, 2023 Features: Adjustable speed / forward / reverse / Reduction. Power Phase: single-phase motor. Speed Ratio 1:3 0-470 RPM/MIN. Speed Ratio 1:3.6 0-390 RPM/MIN. Speed Ratio 1:5 0-280 RPM/MIN.