Specifications: -Input voltage: DC 12-50V (no more than 50v), over 2A -Current input interface: 5.5*2.1mm DC jack -Playable music format: only rectangular wave music can be played -Audio input: Bluetooth connection to mobile phone (mobile phone searches for Bluetooth device M18) -Product size: approx. 65 x 95mm/2.6 x 3.7" (diameter x H) -Arc length: 30-70mm/1.2-2.8" (actually it can be shorter or longer) -Power: 0-100W -With 2pcs replacement MOSFET -Temperature control function Properties: 1.Because the frequency is too high, the heat of the MOSFET will be relatively large. Please pay attention to the temperature of the heat sink during use, so as not to damage the components by too high temperatures (especially in music mode). 2.Please do not place flammable or explosive objects within a radius of 5 m when using the device. 3. Because of serious interference with metals. Please do not come near the coils of electronic devices such as mobile phones, computers, etc., to avoid damage. 4.Since the diameter of the secondary coil is extremely small, try not to bump it so as not to damage the secondary coil winding. 5.Please do not modify the device without permission to avoid accidents. 6. Not for illegal use. 7. Electronic knowledge is strongly recommended. 8.If you do not know how to use it, please do not turn it on yourself. Warning: 1. Please stay away from people with implanted pacemakers and other life-sustaining electronic devices (10m range)! Since the Tesla coil operates in the state of a strong magnetic and electric field, it induces current in the surrounding metal objects, including wires, cables and nearby electronic devices, and generates strong electromagnetic radiation. Therefore, if there are implanted or non-implanted electronic medical devices nearby, the power-on attempt can lead to failure of these devices and pose a life hazard! 2.The control and power parts of the Tesla coil have a voltage above the safe voltage, and direct contact with the limbs is prohibited during operation and troubleshooting. 3.The Tesla coils contain large capacity energy storage devices that still have a lethal voltage even after a power failure. When troubleshooting, the charge of the energy storage device should be discharged first. If a discharge element is installed, you should wait a few minutes before troubleshooting. Manual short-circuit discharge is prohibited as it damages the energy storage device. 4.Solid-state Tesla coils generate a lot of ozone during discharge, so good ventilation of the test site must be ensured. If you do not work in accordance with the regulations or engage in illegal activities, you will have to bear all the consequences yourself! Scope of delivery: 1 x Set of Tesla coil