Feature: 1. Frequency measurement range is 1HZ-1MHZ, which can produce sine wave, triangular wave and squarewave. 2. Wide range of power supply, can use external power supply 9-12V or 9V battery, more convenient to use. 3. All plug-in components, fewer components, simple circuit, simple installation and debugging. 4. Frequency and amplitude can be adjusted, with coarse and fine tuning, simple operation. 5. Five-digit precision resolution, the measurement data display is intuitive and convenient. 6. Widely used in water conservancy projects, water towers, buckets, water tanks, etc. Specification: Condition: 100% Brand New Item Type: Function Generator Material: Plastic Frequency Measurement Range: 1HZ-1MHZ Package List: 1 x Bag of Function Generator DIY Kit Note: The products are all parts, which require you to weld and assemble by yourself.