Sunnytech 5V Super Mini Tesla Coil Wireless Transmission Portable Magic Prop Toy JX01 PORTABLE: only 7.5cm/2.95" in height, powered by 5V power banktake this mini Tesla anywhere you want. EASY OPERATION: no manual needed at all. Plug and Play! ENDLESS FUN: this Tesla has wireless transmission, it can light gaseous tube, it is a perfect teaching tool to spark students interest of science, and also is a great gift. NO SAFETY CONCERNS: it has a low capacity of 5W, safe for adults and kids AMAZING CONVERSATION PIECES ON YOUR DESK: it's funny to see people's looks and reactions when they squeeze a little shot for this Tesla coil model. Plug it and light LED up, and then it works like charm. All of your guests want to know what happened, ice-breaking success.