Bluetooth Music Tesla Coil Arc Plasma Loudspeaker Wireless Transmission Experiment Desktop Toy Model SSTC Like every good startup, JoyTech began our small business in a warehouse in California. We promise to only produce and sell products that we would be proud to use in our own homes and garden. At JoyTech, the “triple bottom line” is alive and well. We’re striving to play an active role in the communities in which we operate. We seek to do right, do well, in support of people, profits, and the planet. We believe in being outstanding stewards of our beautiful nation and planet. JoyTech’s US-based operations abide by a 100% zero-landfill policy. Before power on, make sure to turn the 2 knobs counter clockwise to the end, just avoid sudden loud sound to scare you. Features: 1. Voltage:220V 50/60HZ 2. Watt:0-120W 3. Arc length: 0-10cm(adjustable by rotary switch) 4. Product Size:10*10*6cm/3.93*3.93*2.36in 5. Weight: 0.7kg/1.5lb Caution: 1. Not suitable for people with electronic medical instruments. 2. Do not touch the tesla while working. 3. Please do not use this tesla under environment with flammable and explosive materials or closed coil and big size metal.