Arc plasma coil speaker for science experiment enthusiasts1、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.