Multifunctional BT Tesla coil has the function of wireless transmission, produces touchable electric arc, lights lights, and plays with high sound quality. With the Tesla coil, you can create dazzling artificial arcs that can be used not only in games or art but also for various scientific experiments such as wireless power transmission, wireless light illumination, insulator voltage testing, sewage treating process, etc. And teachers can use it to demonstrate the principle of voltage boosting to students, high-frequency skin effect, etc. It is a perfect teaching tool to arouse students' interest in science, also can be a fine gift.Features:【Beautiful Appearance】:It is compact in size, light and portable, beautiful and stylish, with fine durability by adopting a strict production process. The electric arc effect of this Tesla coil is very dazzling and interesting, and it is also a beautiful decoration for your home at night.【Touchable Artificial Arcs】:It produces a palpable arc that, when touched by the hand, provides a sensation similar to a soothing hand massage at a SPA. Two rotary knobs design for you to adjust the the size of the arc and the working frequency. 【Wireless Transmission】:The Tesla coil can generate a high frequency and high-pressure electromagnetic field so that the lights containing conductive gases can be illuminated by the electromagnetic field. Includes fluorescent light, LED light, neon light, and some rare gas-glass tubes.【Ignition Mode】:With ignition mode, the arc is essentially a high- plasma that can ignite flammable materials when the device releases arcs at a high frequency.【BT Input】:Features a BT playback mode design, users can enjoy their favorite songs. BT mode plays squarewave by connecting the device with cellphone through BT, the electric arc flashes with the rhythm of