Viewers can use different volume for voice sounding tree, observe the amount of lights. Acoustic sensor the received sound into an electrical signal, coupled to amplify. Then classification treatment, appropriate lighting levels lights. Wuhan Star Popular Science Technology Co., Ltd. Main products include: science exhibits, teaching equipment, experimental box, Science and Technology Museum building, children's play equipment, laboratory construction, primary and secondary general education equipment, science museum exhibits, multimedia teaching vocational equipment, Warmly welcome all dealers or professional bodies to cooperate with our company, to develop the market and contribute to science and education.