【Creative & Bluetooth Connection】This experiment musical coil model can be used as a physical experiment, when touched by hand, there will be a tickling sensation, very interesting, play music through Bluetooth connection, play square wave music lightning energy concentration in the form of clusters, can effectively attract attention and improve the students' exploration ability. 【Ideal Science and Physics Teaching Model】This experiment musical coil model has wireless transmission and speaker function, and can light up neon lights. It can be touched at will to produce lightning in the hands, which is very suitable for people to learn science and physics, and is a good physics and science teaching tool. 【Wireless】This experiment musical coil model is wireless, no grounding and audio cable connection. Slowly increase the power to control the lightning arc gradually become larger and thicker, but also can be connected to the phone, switch to the music gear, so that the lightning with the rhythm of the music change, very creative. 【Multifunctional】This experiment musical coil model can wirelessly light up a variety of gas lamps, such as neon, fluorescent lamps, old-fashioned energy-saving lamps, etc., multi-functional design to meet your needs. Notice: 1. The product comes with a US plug, if you are an EU user, please prepare a US to EU adapter 2. The normal music effect is not ideal, it is recommended to use square wave music Options Power supply voltage: AC 110-220V 50/60Hz Power: 0-120W Zipper length: 0-10 cm (adjustable by handle) Host Size: 106*106x61mm Package size: 350*235*195mm Package: 1 x Bluetooth Music Tesla Coil