SOUND METER

The appearance of the product body is like a pea pod. It is small and lovely. The middle groove design have great originality, the mother's fingers hold here, both comfortable and convenient. There is no button in the product ontology, the best way to do it is to be concise, and a circular indicator is above it. Under the condition of electricity, the product ontology is directly connected to the cell phone audio hole, and the indicator light turns green to boot state.