For Coil Music Experience: This coil is designed to play square wave music and can provide a unique sound experience. Please turn the PWR knob to the minimum before use to avoid sudden loud volume. This device offers an engaging way to explore the power of electromagnetic coils. Perfect science education gift: Easy to operate and ideal for demonstrating wireless lighting and voltage boosting principles. Whether you are a science teacher, researcher, or amateur science enthusiast, this kit provides a hands-on learning experience that helps deepen understanding of scientific concepts. Optimized and upgraded design: Features thick, customized headphones to avoid the weakness of standard universal headphones, ensuring a compact and durable structure. To improve Bluetooth connectivity, the Bluetooth connection name has been updated to Coil 10, and the PCB Bluetooth module patch has been removed. The module uses gold plating and transparent ink technology, which helps resist interference and emits a consistent backlight. Shocking -Mode: Install the needle, connect the power, and slowly adjust the PWR knob. Observe electrical discharges dancing on the tip of the needle, producing striking visual effects and attention-grabbing sounds that captivate everyone in the room. Engaging Music Mode: No need to download music or use a USB drive. Simply scan the QR code on the device to access the square wave music link. Switch to music mode, increase your phone’s volume, and adjust the PWR knob. Watch the electrical arcs move in sync with the music rhythm, delivering an exceptional audio-visual experience. Plug Type: UK plug, suitable for use in Malaysia, the United Kingdom, and other compatible regions. Voltage: AC220V Color: As shown Material: Plastic Package Contents: 1 * Music Coil Note: Light reflection and differences in display screens may cause slight color variations between the image and the actual item. Measurement error allowed is +/- 1-3 cm.