Transparent case: Our hydropower generator has a transparent case. You can view the turbine and power generation in real time and appreciate your own handmade DIY creations Bright and beautiful: This micro generator has a smooth and clean appearance, is free from rust and scratches and is suitable for scientific demonstrations for children or for charging dry batteries Compact design: the pump turbine generator has a compact design, the close connection between the turbine and motor can convert energy with efficiency, its noise is low and its working performance is stable. Instructions for use: The power generated by the generator is proportional to the water pressure. The larger the water flow, the higher the output power. It is suitable for working with circuits with voltage stabilisers. [Various Models] We offer three different types of hydropower generators: 5V, 12V, 80V (optional). Different voltages are suitable for different scenarios. There is always one you need