Body material: acrylic Input voltage: 48V Music transmission method: Bluetooth, AUX audio input Arc length: 0-8cm Discharge frequency: 5-50Hz Host size: 3.9*9*9cm/1.54*3.54*3.54 Logistics weight: 500g Logistics size: 17.3*11.5*9.5cm/6.81*4.53*3.74 Small Body with Strong Energy: With complicated circuit design and an upgraded larger top booster coil, the optimized coil arc is long and thick, which has amazing energy. Turn the voice slowly to avoid big shock by the arc sound. Before power on, make sure to turn the 2 knobs counter clockwise to the end, just avoid sudden loud sound to scare you. Long Arc Mode & Music Mode: When the knob is turned to medium power, it can be touched, and you will only feel a little tingling. Music mode: Connect to the device via Bluetooth, it can play square music, and energy is concentrated in the cluster. You can see the arc of coil beating to the music, it will present an amazing sparkling melody. Stable Bluetooth: Independently developed Bluetooth chip can adapt to mobile phones, computers and other Bluetooth devices, Bluetooth connection is more stable. Type-C is also supported. There is better coil technology, which is covered in gilt clear ink for better dust resistance and improved stability. Easy to Use: The wireless transmission experiment model requires no audio cable connection, easy to operate, just tighten the discharge pin, turn down the power and frequency, and plug in, it will present an amazing sparkling melody. Modules can be placed horizontally or vertically, depending on your preference. It's absolutely a magic for kids even for adults, they will become fascinated for this coil. Endless Fun: This music has the function of wireless transmission and loudspeaker, can light gaseous tube and kind of bubbles. The arc of the wireless transmission experiment model can be touched at will, with only a slight feeling and temperature, use it with confidence. It is a perfect teaching tool to spark students interest of science, also a great gift. It's also a cool piece of art even just stands on your desk. Note: Please do not approach flammable and explosive materials while working Avoid electric arcs hitting other electronic devices Be careful not to be poked by the discharge needle Minors need to be under adult supervision