Feature: 1. ADJUSTABLE 010CM THUNDER LENGTH: This music coil has a circuit protection design, does not damage the input device, can play better quality square wave music than curved plasma speakers, plug in and light the LED bulb, will work like a glamour, an interesting art decor 2. EASY TO USE: The wireless transmission experimental model does not need to be connected to the sound cable, and is simple to operate, just tighten the discharge needle, reduce the power and frequency, then plug in, and will present an amazing sparkling melody 3. MULTIPLE PLACEMENT: The music coil module can be placed horizontally or vertically, depending on your preference. This is definitely a draw for kids and even adults who will be fascinated by this coil 4. SMALL BUT POWERFUL: The music coil support square wave music, which is more suitable for the music coil. Depending on the discharge frequency, different tones are produced, and the spark gap arc can also jump with the rhythm of the music 5. GREAT GIFT: With wireless transmission and speaker capabilities that light up gas tubes and various bubbles, this music coil is the perfect teaching tool to spark students interest in science and make a great gift Specification: Item Type: Music Coil AC Plug: AC100-240V 50/60HZ Rated Power: 60W Discharge Frequency: 5-45HZ 10%(lightning mode) Arc Length: Approx. 0 ~ 10cm / 0 ~ 3.9in Color: Gold. Package List: 1 x Music Coil Host 1 x Discharge Needle 1 x Induction Needle 4 x Small Light Bulbs 1 x Glass Tube 1 x Accessory Storage Box 1 x Power Adapter 1 x User Manual