Features: 1. Install the discharge needle and screw it on the fixing hole.  2. Connect the power supply to the host.  3. Insert the plug into the socket. Use a playback device that supports Bluetooth to search for "HW-Audo" and connect. After the connection is complete, switch to the music mode to start playing music. (Please adjust the volume of the playback device to the maximum when playing music.)  Specification: Item Name: Tesla coil;  Power supply voltage: 220VAC 50/60Hz;  Power: 0-100W;  Flash length: 0-10cm (adjustable by knob);  Host size: 106*106*61mm;  Logistics size: 350*235*195mm;  Logistics weight: 0.9Kg;    Note: 1. Please understand the product might have some colour difference due to different monitors and scenes.  2. Please allow slight deviation for the measurement data.    Package Included: 2x Neon bulb;  1x Discharge pin;  1x Power adapter;  1x Host