This music has the function of wireless transmission and loudspeaker, can light gaseous tube and kind of .It is a perfect teaching tool to spark students' interest of science, also a great gift. It is a smart device for wireless transmission experiments. It can be used to create high-voltage thunderclap and do various scientific experiments, such as wireless power transmission, wireless lighting, and insulator withstand voltage test. Teachers use it to demonstrate the principle of boosting and high-frequency skinning to students. Effect etc. This music has circuit protection design, will not damage the input device, can in better quality than normal arc plasma loudspeaker. BT connection, convenient and fast. Plug Type:US Plug, it applies to Canada, India, Mexico, Thailand, Taiwan, the , the Philippines and so on. Voltage:AC100-240V Colour:Black Material:ABS Package Contents: 1 * Musical Coil with accessories 1 * Power supply Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.