Features: Experience the unique blend of wireless transmission and speaker functionality with the Golden Music Coil, engaging tool for captivating demonstrations and experiments. This touchable artificial device ignites interest in scientific research, making it excellent educational aid with its ability to produce high voltaged for various experiments. For students and individuals interested in nature and technology, this coil serves as a perfectly gift for science enthusiasts. For science lab, classroom teaching, home gatherings, or as innovative art display, it enhances learning through practical demonstrations of amplification and high frequency skin effect principles. With a safety circuit protecting designing, this speaker ensures highly music playback through wireless connection, featuring a well designing board for optimaled performances. Specifications: Shell Component: Clear Acrylic Input Voltages: 48.0V Discharge frequency: 5-50Hz Music transmission method: Bluetooth-compatible Auditory Size: about 39x60x90mm/1.54x2.36x3.54in Standard：Optional Package Includes: 1Set Music for Coil Speaker note: Due to problems of lighting effects, there might be tolerances in product, please understand. Please allow 0-1cm error due to manual measurement.