Features: 1. This SSTC Tesla coil generates high-frequency alternating current through chip oscillation. It can also be controlled by audio, causing the arc to produce sound. Additionally, it supports wireless power transmission, making the SSTC Tesla coil a multifunctional device with high playability, visual appeal, and practical applications in science education. 2. The design incorporates a more complex circuit and a larger top boost coil. Every component is carefully selected and made with quality materials. The dense circuit is integrated into a 10x10cm PCB, saving space while showcasing a striking lightning effect. The optimized Tesla coil produces long and thick arcs. 3. Connect your phone and play square wave music, and the Tesla coil's arc will pulse with the rhythm. With the knob set to medium power, touching the lightning will produce a slight tingling sensation. It's an excellent teaching tool for sparking students' interest in science and can be used for wireless power transmission and lighting. 4. The product has two knobs: one for adjusting frequency and the other for power. Before use, set both knobs to their minimum settings. Failure to do so may result in a startling arc and loud thunder upon powering on. At maximum power, the device will produce unavoidable thunder, which may be harsh. Adjust the power or turn off the device to maintain a quiet environment. 5. The operation is simple. Tighten the discharge needle, turn down the power and frequency, and plug in the power supply to see the lightning. Gradually increase the power to control the arc's size and thickness. You can also connect a phone, switch to the music gear, and make the lightning dance to the music. (Not suitable for all crowds; read further descriptions for precautions). Specification: Material: Plastic Product Color: Black Package Size: 22.5 x 19.5 x 8.5cm Package Weight: 720g Power: 0-120W Power Supply Voltage: 110-240VAC, 50/60Hz Lightning Length: 0-10cm (Adjustable Knob) Package Includes: 1 x Music Tesla Coil Artificial Lightning Desktop Toy