1,[ Double Mode Speaker ] is designed with music mode and flash mode, can be connected to a mobile phone to , and provides you with a musical experience. 2,[ Square Wave Music Box ] Music Coil Speaker flashes with the rhythm of the music, the sound is produced by vibrating the air, which is the real "electric sound", features a high discharge frequency, and the arc effect is . 3,[ Easy to Adjust ] By moving the knob on the Wireless Music Speaker, you can change the arc's length and frequency. You can use it with more assurance thanks to the high temperature protection mechanism. 4,[ Wide of Applications ] Coil Music Box features an artificially simulated flash function that can be used as a experiment tool, with an itching sensation when touched, improving students' to learn and . 5,[ perfect Gifts to ] Wireless Musical Coil is easy to use and has an flashing melody when plugged in, can be used to , do scientific experiments, insulator to withstand voltage tests, etc, great as a gift for your and family. The Music Coil Speaker has music mode and arc lighting mode. You can connect to your mobile phone by BT or audio cable to . The arc flashes with the rhythm of the music and makes a sound by vibrating the air. The length and frequency of the arc can be adjusted. High-temperature Protection: Stop discharging when the temperature is too high, and resume operation when the temperature is lower than the warning temperature. Notice: 1. Do not approach and items when using 2. Avoid arcing to other electronic equipment 3. Be careful not to be poked by the discharge needle 4. need to use it under adult 5. Do not place items on the panel of the to avoid damage to the shell due to high temperature 6. People with pacemakers are prohibited from using it Size: about 9x9x3.3cm|3.54x3.54x1.29 inches Music transmission way: Wireless/AUX audio input Plug Type: US Plug, it applies to Canada, , Mexico, Thailand, Taiwan, the , the Philippines and so on. Voltage: AC100-240V Power input: 48V Arc length: 0-8 cm Discharge frequency: 5-50hz (flash mode) Rate power: 100W Colour:As Shown Material:plastic+metal Package Contents: 1 x 1 x discharge needle 2 x light Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.