This musical Tesla coil features wireless transmission and built-in speakers. It can ignite gas tubes and create visual plasma effects. It serves as an engaging educational tool to spark interest in science and makes a thoughtful gift. Long Arc Mode & Music Mode: - Long Arc Mode generates electrical arcs at a fixed frequency. At medium power, the arcs are safe to touch and produce only a mild sensation. - Music Mode enables Bluetooth connectivity. When paired with a device, the coil converts audio signals into synchronized electrical arcs, creating a visually dynamic light-and-sound display. Compact design measures 3.5 x 3.5 x 1.3 inches (8.9 x 8.9 x 3.3 cm). Features an upgraded top load coil and advanced circuitry for enhanced performance and stability. The device includes an integrated Bluetooth chip compatible with smartphones, tablets, and computers. USB-C power input is supported. The coil is coated with gold-plated protective coating for improved durability and dust resistance. Operation is simple: adjust the discharge pin and power settings, then power on. For optimal experience, gradually increase volume to minimize sudden arc sounds. Before powering on, ensure both control knobs are turned fully counterclockwise to prevent unexpected noise. Wireless operation eliminates the need for audio cables. Safety warnings: 1. Not recommended for individuals using electronic medical devices. 2. May interfere with nearby electronics during operation. Keep phones and other sensitive devices at a safe distance. 3. Do not operate in environments with flammable gases or materials.