Specification:A1- DC 5V 40RPM1.Rated voltage: DC 5V2.No-load current: 20mA3.No-load speed: 40RPM4.Suitable voltage: DC 3V-6V5.Speed: 24RPM-48RPMA2: DC 5V 60RPM1.Rated voltage: DC 5V2.No-load current: 50mA3.No-load speed: 60RPM4.Suitable voltage: DC 3-9V5.Speed: 30RPM-108RPMA3: DC 5V 28RPM1.Rated voltage: DC 5V2.No-load current: 20mA3.No-load speed: 28RPM4.Suitable voltage: DC 3V-6V5.Speed: 17RPM-33RPMA4: DC 3.7V 150RPM1.Rated voltage: DC 5V2.No-load current: 80mA3.No-load speed: 150RPM4.Suitable voltage: DC 1.5-5V5.Speed: 60RPM-200RPMA5: DC 5V 300RPM1.Rated voltage: DC 5V2.No-load current: 30mA3.No-load speed: 300RPM4.Suitable voltage: DC 3-6V5.Speed: 180RPM-360RPMA6: DC 5V 110RPM1.Rated voltage: DC 5V2.No-load current: 60mA3.No-load speed: 110RPM4.Suitable voltage: DC 3-6V5.Speed: 66RPM-130RPM