Features: 1. This is an SSTC Tesla coil that generates high-frequency alternating current through chip oscillation. It supports audio control, allowing the arc to vibrate air and produce sound. It also enables wireless power transmission, making it a multifunctional device with high interactivity, visual appeal, and educational value. 2. Features a refined circuit design with an upgraded, larger top load coil. All components are made from quality materials and carefully selected. The compact circuit is integrated into a 10x10cm PCB, saving space while delivering a striking lightning effect. The optimized coil produces long and thick electrical arcs. 3. Connect to your phone to play square wave audio, and observe the Tesla coil's arc pulsing in sync with the music. At medium power, you can safely interact with the arc and feel a mild tingling sensation, creating an impressive demonstration. It serves as an excellent educational tool to spark interest in science and can demonstrate wireless power transfer and wireless lighting. 4. The device includes two control knobs: one for frequency and one for power. Before powering on, ensure both knobs are set to minimum to prevent an unexpectedly large arc or loud noise upon startup. At maximum power, audible discharges are normal. If the noise is excessive, reduce the power or turn off the device to maintain a quiet environment. 5. Operation is simple: secure the discharge needle, set power and frequency to minimum, connect the power supply, and gradually increase power to produce visible electrical arcs. Adjust to enlarge and strengthen the arc. Connect your phone and switch to music mode to make the arcs move in rhythm with the sound. (Not intended for use in crowded areas. Refer to safety instructions.) 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 Arc Length: 0-10cm (Adjustable) Package Included: 1 x Music Tesla Coil Artificial Lightning Desktop Toy