Arc Plasma Coil Bluetooth Speaker Wireless Transmission Science Experiment Model for Physics Study Features： 1、Lighting Mode: You can slowly increase the power to control the arc, making it gradually become larger and thicker. 2、Music Mode: The artificial toy can be connected to a phone via BT. Switch to the music mode and will dance to the rhythm of the music, creating a unique and entertaining visual display. 3、High Temperature Guard: This coil is equipped with a high temperature guard feature. If the working temperature becomes too high, the device will automatically stop discharging to ensure safety. 4、Easy to Operate: The BT speaker artificial generator is designed for user friendly operate. Simply tighten the discharge needle and plug in the power supply to start the device. 5、Educational and Fun: Whether you're a science teacher, an amateur enthusiast, or a researcher, this device provides a practical way to better understand basic scientific concepts. It's not only a valuable educational tool but also a fun toy gift. Specification： Specifications: Main Material: Acrylic Input power: 60W Input voltage: 48V Discharge frequency: 5-45Hz10% Size: 9*9*3.25cm/3.54*3.54*1.28inch Package List： 1 * Host 1 * Discharge Needle 1 * Probe 4 * Small Bulb 1 * Power Adapter 1 * Manual