Instructions: 1. When the device is used for the first time, it may happen that the arc trigger switch is pressed and the arc fails, and the LED2 on the function panel can be observed, that is, the SRT indicator is off. If this happens, the user needs to Turn off the power switch and turn it on again, let the device release the protection state, until the RST indicator on the function panel lights up again. 2. After the RST indicator lights up again, the user needs to touch the discharge needle of the device, and then try to trigger the arc trigger switch again to assist the startup of the device. This process can be tried several times until the device can emit arcs normally.  3. If the RST indicator suddenly goes out during use, you can try to turn off the power switch and restart the device again to return to normal. 4. The device is powered by 3 series 18650 lithium batteries, and the discharge cut-off voltage is 10.6v. When the user observes that the voltmeter on the function panel shows 10.6v, please charge the device in time Otherwise, the battery will be damaged. The hand-held Tesla coil is a portable artificial lightning generating device. Its shell is made of fully transparent acrylic sheet. The number of beautiful artificial lightning is as high as 1700 times, and it has a good performance in terms of effect and battery life. This product adopts the key-type single trigger mode, and does not have the function of automatic triggering and music playback. Category: Handmade DIY Assembly Works  Power supply: 12.6V lithium battery pack 2200mA  Charging: 12.6V1A  Endurance: ≥1700 times  Frequency: 1.1-1.3Mhz  Size: Length 20cm Width 7.1cm Height 18cm  Arc: 13cm