Features: This music tesla has the function of wireless transmission and loudspeaker, can light gaseous tube and kind of bubbles.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 lightning 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 tesla has circuit protection design, will not damage the input device, can play music in better quality than normal arc plasma loudspeaker. BT connection, convenient and fast. Adopt a newly designed PCB circuit board, the circuit design is reasonable. Specifications: Power voltage: 110-240vac 50 / 60Hz Host size: 186 * 106 * 58mm package weight:950g package size:21x15x13cm