Feature: 1. Music Player Function: This Tesla coil adds a music player function which can play cell phone and computer music. 2. Large Integrated Heatsink: This Tesla coil features a large integrated heatsink for extremely low heat generation, integrated feedback and safety on the circuit board for safety and security. 3. Dual Mode Arc Extinguishing: This Tesla coil uses dual mode arc extinguishing, which allows you to input square wave music or manually control it, allowing you to manually adjust the frequency and pulse width. 4. Easy To Carry: This Tesla coil is small in size and light in weight, which is very convenient to carry around and practical. 5. Multifunctional: This Tesla coil is versatile enough to work for a long time without interruption, and it can also be equipped with lights, foam energy saving lamps, strobe tubes, wireless power supply, and rotating arcs. Specification: Item Type: Tesla Coil Material: Acrylic Power: 800W Module Battery: 400mah Lithium Ion Battery x 1 ( Shipped With Built In Battery ) Size: Approx. 45 x 17.5 x 15cm / 17.7 x 6.9 x 5.9in. Package List: 1 x Main Body1 x Power Supply1 x Fiber Optic Cable 1 x Charging Cable 1 x Sound Cable1 x Discharge Pin1 x Controller1 x Module Note: This Tesla coil is high voltage and the earth wire must be connected to earth, or to a fire hose, lightning rod, radiator or outlet grounding wire.