Features: 1. This SSTC Tesla coil generates high-frequency AC through chip oscillation and can be controlled by audio. The arc pushes air to create sound and supports wireless power transmission, making it a multifunctional art piece with high playability, great display, and practical science education. 2. A more complex circuit design and a larger upper boost coil surface have been implemented. Each accessory is made of real, carefully selected materials. The dense circuit is integrated into a 10x10cm PCB, saving space and showcasing the perfect lightning effect. The optimized Tesla coil arc is long and thick. 3. Connect to your phone and play square wave music to see the Tesla coil's arc beat to the music. With the knob turned to medium power, you can touch the lightning with your hand and feel a slight tingle, making you look extra powerful in front of your friends. It's also the perfect teaching tool to stimulate students' interest in science and can be used for wireless power transmission, wireless lighting, etc. 4. The product has 2 knobs, one to adjust the frequency and one to adjust the power. Before turning it on, adjust both knobs to the minimum, or you'll be startled by the arc and loud thunder. At maximum power, thunder is inevitable, and sometimes it will feel very harsh, so adjust the power or turn off the device to ensure a quiet environment. 5. It's convenient and easy to use. Just tighten the discharge needle, turn down the power and frequency, connect the power supply, and you can see the lightning before your eyes. Slowly increase the power to make the arc larger and thicker. You can also connect your phone, switch to music mode, and let the lightning dance to the rhythm of the music. (Not suitable for all, read precautions). Specification: Material: Plastic Product Color: Black Package Size: 22.5 x 19.5 x 8.5 cm Package Weight: 720g Power: 0-120w Power Supply Voltage: 110-240VAC 50/60hz Arc Length: 0-10cm (Adjustable Knob) Package Included: 1 x Music Tesla Coil Artificial Lightning Desktop Toy