Desktop integrated mini solid-state Tesla coil finished product,the primary and secondary are made of PCB.It is a change from the traditional solenoid secondary Tesla coil,which is highly integrated and more clean and safe.The 2 in 1 Tesla coil has both a toroidal coil and a coil head integrated with 6 discharge needles.Plug in the power supply and you can experience the charm of in the palm.The low-voltage power supply ensures safety,and the effect is stronger than most desktop-grade commercial half-bridge Tesla coils on the market.The 2M high frequency sub-level,there is no pain even if you touch the arc with your hands.The power supply is a DC power adapter,no need to be grounded,it is more stable,the heat sink has a temperature control switch,the power supply has over-current protection,the pulse width of the music mode is limited,and multiple protections.There is no fan to dissipate heat (because the heat is very low),do not run at maximum power for too long,so as to avoid the temperature control protection is too fast.Bluetooth connection can play square wave music,increasing its playability.At low frequencies,you can freely play the arc between your palms.The frequency of the music mode is higher.When the arc is concentrated at one point,there will be a burning sensation.Suitable Crowd:Over 10 years old.The product is rich in science,education and collection value.It is an excellent gift for friends or children at birthdays,Christmas,family gatherings,invitations,Halloween,Easter,Thanksgiving,Christmas and other beautiful moments.It is also the best gift for building science experience lovers.Plug Type: US Plug, it applies to Canada, India, Mexico, Thailand, Taiwan, the United States, the Philippines and so on.Material:PCB board+components+stainless steel+coppercolour:blackPackage Contents:1 set * Tesla CoilOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.