Features: The Tesla coil can produce high temperature and high pressure plasma, which can sing, ignition, wireless transmission, and light fluorescent lamp. Tesla on the basis of the general increase of the music player, you can play phone / computer music, a clear sound. This is a mini DIY tesla kits, need to be assembled. It is a perfect teaching tool to spark students' interest of science, also a great gift. It has the function of wireless transmission, can light gaseous tubes. This tesla can play many kinds of music in a great quality. Tesla Coil Kits ONLY,other accessories demo in the picture is not included. Specification: Color: As shown in the picture Circuit Board Length: app.71mm/2.80in Cylinder Height: app.76mm/2.99in Voltage: DC15-24V Current: 2A Quantity: 1Set Note: No retail package Transition: 1cm=10mm=0.39inch Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1Set x Mini Speaker Music Tesla Coil Kits