Specification: 100% brand new and high quality Material: Electrical components Color: As shown in pictures Tesla on the basis of the general increase of the music player, you can play phone / computer music, a clear sound. 15-24 V DC input voltage When 24 V, 5-10mm arc length meters is ideal, small size, power range and power, can be a long working Energy-saving lamps, frequency flash tube, you can play power transmission wireless, rotary arc and so on. Parameters: Size: 38 * 79mm Power: 15 w Power Input: DC 15-24V, Current 2A, DC5.5 Interface Audio input: 3.5 jack, you can connect your phone, mp3, computer audio Plasma speaker stereo speakers: the principle is to stimulate the plasma arc of air turned into air vibrations generated by the expression of a new concept, you can access your phone, mp3, computer audio input, this mini speaker Tesla plasma arc speaker compared to the actual real experience better sound high-frequency response, and spark plasma arc speakers have good sound quality, stable and safe, you can play any song without earthing, easy to Use resources compared; There is no doubt as a new member stereo home player! Principle of wireless transmission: a coil connected at both ends with both ends LED, near-emitter device, Qiliang LED, the principle is resonant wireless power transfer Precautions: 1. Product safety, power is not high, not because of an electric shock, but is not recommended to touch the top of the arc coil, there will be a burning sensation. 2. After a long time the power does not touch the heat sink, the temperature is very high, especially when using a huge 24V high-voltage heat, reserve a fan interface, plus cooling fan if necessary. 3. It is not recommended to work on the body or other objects near the coil Tesla coil, the coil within half a meter next to other objects can not be left blank, because other objects such as a good conductor coil will form a good Loop, coil to absorb energy, then pull the coil or unable to Water demonstrate the effect of the demo variation! please, note; 4. Not for the phone, mp3 and other electronic equipment near the coil, the coil generates a high frequency magnetic field would interfere with these mobile phones, mp3 and other equipment failure or damage! Package Included: 1X DIY15W Mini Speaker Music Tesla Coil Kits (NO Include Stainless Ball !!!)