Features: 1. This SSTC Tesla coil generates high-frequency alternating current through chip oscillation and supports o control, allowing the arc to produce sound by vibrating the air. It also supports wireless power transmission, making it a multifunctional desktop device with high entertainment value, visual appeal, and educational utility in science. 2. Features an advanced circuit design with an upgraded larger top load coil. All components are made from quality materials and carefully selected. The compact and dense circuitry 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 and play square wave music to see the Tesla coil's arc pulsate in sync with the rhythm. At medium power, you can safely touch the arc and feel a mild tingling sensation, creating an impressive demonstration for friends. It serves as an excellent educational tool to inspire interest in science and can demonstrate principles of wireless power transfer and wireless lighting. 4. The device includes two knobs: one for frequency adjustment and one for power control. Before powering on, ensure both knobs are set to minimum to prevent sudden large arcs or loud noises upon startup. When operating at maximum power, ble 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 enlarge the arc. You can also connect your phone and switch to music mode to make the arc dance to the beat. Not intended for use around crowds. Follow all safety 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 Arc Length: 0-10cm (adjustable via knob) Package Included: 1 x Music Tesla Coil Artificial Lightning Desktop Toy