Features: This music Tesla has wireless transmission and speaker functions, which can light-gas tube and various bubbles, perfect teaching tool to stimulate students interest in science and physics teaching, and it is also good birthday gift, holiday gift, new year present for your kid, family or friend. The music Tesla coil produces different tones according to different discharge frequencies, and the spark-gap-arc can also jump with the music rhythm, insert and use. Bluetooth-compatible connection, no audio wire connection, you just need to tighten the discharge needle, lower power and frequency, insert in power supply, and you can see light flashing in front of you. It has wireless transmission and speaker functions, can light neon-lights, and can touched at will with slight feeling and temperature. Small body, high-power, it can emit 10cm beautiful sound, you can also connect the mobile phone application, switched to the music device, and let the light-arc enter the music. This music Tesla has circuit protections designing that will not damage the input device, and the quality of playing music is better than that of ordinary arc-plasma speaker. Specifications: Material: Acrylic+Printed Circuit Board Size: Approx. 106x106x58mm/4.17x4.17x2.28inch Power Supply Voltages: AC110-240V 50/60Hz Power: 0-120W Light Length: 0-10cm (adjustable by knob) Applicable Age: for 7-14 years old teens Note: The product comes with American adapter. If you are an European user, please prepare an adapter(not included). Please allow 0-1cm error due to manual measurement. Please allow for slight color difference due to different display resolution. Package includes: 1x Music Tesla Coil 1x Power Adapter 4x Atmosphere Lamps 1x Discharge Needle 1x Operating Instruction