Multifunctional flat panel BT Tesla coil, has the function of wireless-transmission, can produces touchable electric arc, lights up lamp and plays songs with high sound quality. with the Tesla coil you can create dazzling artificial lightnings, and can be used not only in games or art, but also for various scientific experiments such as wireless power transmission, wireless lightings, insulator voltage testing, sewage treatments, teachers using it to demonstrate the principle of voltage boosting to students, high frequency skin effect, etc. It is a perfect teaching tool to spark students' interest of science, also can be a fine gift. Features: The gold plated coil design, with a clear and complete turn by turn coil, , easy for you to understand the basic construction of a Tesla coil, beautiful and stylish, with fine durability. Interference resistant circuit design, it will not be interfered by high-frequency electromagnetic signals, so that you can rest assured to use. Tesla coil can produce a high frequency and high pressure electromagnetic field, so that the lights that contains conductive-gases can be illumined by the electromagnetic field. Wireless-transmission, the Tesla coil can produce high temperature and high pressure plasma, which can support wireless turn on your lights and ignite without contact. BT connection to plays mobilephone songs, directly on board BT chip, with a antenna to search for BT M18, switch to song mode to starts playing songs. When playing songs, please turn the cellphone volumes to maximum and turn up the energy knob. The arc effect of this Tesla coil is very cool and interesting, also a beautiful home decoration at night. It is a perfect teaching tool to spark students' interest of science, suitable for various scientific experiments such as wireless power transmission, wireless lightings, insulator voltage testing, sewage treatments, teachers using it to demonstrate the principle of voltage boosting to students, high frequency skin effect, etc. Note: Normal song does not work well, we recommend using squarewave songs. Specifications: Name: Tesla Coil Material: printed circuit board Voltage: 110-240 VAC Power: 0-120W Arc length: 0-100mm adjustable Item size: 58 * 106 * 106mm / 2.28 * 4.17 * 4.17in Package size: 195 * 145 * 115mm / 7.68 * 5.71 * 4.53in Package weight: 659g / 1.45lb Packing List: 1 * Tesla Coil