①. Gold-plated coil design, with a clear and complete turn after the coil, easy to understand the basic structure of the Tesla coil, with durability. Anti-interference circuit design, it will not be interfered by high-frequency electromagnetic signals. The Tesla coil can produce a high-frequency and high-pressure electromagnetic field, so that the lights containing conductive gas can be illuminated by the electromagnetic field. Wireless transmission, the Tesla coil can produce high-temperature and high-pressure plasma, which can support wireless light activation and non-contact ignition. BT connection to play mobile phone music, directly on-board BT chip, with an antenna to search for BT M18, switch to music mode to start playing music. When playing music, turn the volume of the mobile phone to the maximum and turn the power knob. The arc effect of this Tesla coil is interesting, and is also a home decoration at night. It is a teaching tool to stimulate students' interest in science, suitable for various scientific experiments. ②. Material: PCB ③. Color: As shown ④. Voltage: 110-240 VAC ⑤. Power: 0-120W ⑥. BT: Yes ⑦. Arc length: 0-100MM adjustable ⑧. Size: 106MMX64MM (4.17"X2.52") ⑨. Package includes: 1PCS X Music Tesla Coil