Features: This product is a three-phase AC-generator that can be-connected to any two wires to light up LED beads. Suitable for micro wind-power generation, micro hydraulic hand friction power generation system, and can also be used as a teaching aid and textbook model for three-phase AC-power generation in schools. Mainly suitable for charging small batteries, therefore, when using this motor, it is necessary to convert AC-power into DC-power, which needs to be rectified and filtereds. When the motor noise increases, gear lubricating oil can be added to the motor gears. Great for students, DIY enthusiasts, and anyone looking to learn about three-phase AC-power generation and renewable-energy sources. Specifications: Material: Metal Bottom Motor Rotor是、 Diameter: Approx. 28.5mm/1.12inch Fixed Plate Size: Approx.30x30mm/1.18x1.18inch Overall Size: Approx.30x30x13.2mm/1.18x1.18x0.52inch Shaft-Size: Approx.3x31.5mm/0.12x1.24inch Line Length: Approx.70mm/2.75inch (Exposed Part) Voltage: 3v-24v Current: 0.1a-1a Rated-Speed: 300-6000Rpm Rated-Power: 0.5-12w Package Includes: 1 Set Mini Hand Brushless Motor Generator note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.