Description Overview Two brush dc servo motors with variable speed Motor 1: M-400 Model: M-400 Voltage: 110V/220V Power: 400W Frequency: 50/60Hz Speed range: 0-3600 RPM Motor 2: M-550 Model: M-550 Voltage: 110V/220V Power: 550W Frequency: 50/60Hz Speed range: 0-3600 RPM