The Echoo Synthesizer Kit is an inspiration source and creation platform for music lovers. Echoo includes two modules: note input and song editing, its function can be extended by connecting music engineering software(such as Ableton live). There are electrical signals on the surface of animal and plant cells. The transformation from electrical signal to note signal is realized by using the electrodes. Echoo uses the raised arc line as the semantic prompt of "press", "slide", "rotate" and "pinch", and uses the circle and Roman numerals 1 to 3 as the direction prompt of knob and slide bar.