Feature: 1. [Multi Functional] This desktop toy can generate touchable arc, with adjustable lightning length from 0 to 10cm, can also play square wave music, light up LED bulbs when plugged in. With circuit safety design to guard input devices. 2. [Small Yet Powerful] Despite its small size, this artificial lightning arc generator possesses astounding energy and delivers mesmerizing visual effects, providing an electrifying and captivating experience. 3. [User Friendly] No sound cables needed, simply tighten the discharge needle, adjust power and frequency, and plug in to witness a dazzling display of glowing melodies. 4. [Music Playback] Supporting square wave music, the coil can produce different tones according to different discharge frequencies, and the spark arc can also jump with the rhythm of the music. 5. [Education Tool] Features wireless transfer and speaker functions, capable of lighting gas tubes and various bubbles, making it a perfect educational tool for inspiring students interest in science. Specification: Item Type: Arc Plasma Coil Desktop Toy Material: Acrylic Plug: AC100-240V 50 60Hz Rated Power: 60W Discharge Frequency: 5-45Hz ±10% (Lightning Mode) Arc Length: Approx. 0-10cm / 0-3.94in Color: Frosted Transparent. Package List: 1 x Coil Host 1 x Discharge Needle 1 x Induction Needle 4 x Small Bulbs 1 x Glass Tube 1 x Accessory Storage Box 1 x Plug Power Adapter 1 x Instruction Manual Note: 1. Slowly rotate the sound to avoid significant vibration caused by arc sound.2. Before powering on, please make sure to rotate both knobs counterclockwise all the way to avoid sudden noises that may startle you.