The product is a portable artificiallightning generating device. The surface is fully transparent acrylic sheets, and powered by a 12.6V 2800mAh high-capacity lithium battery, which can produce beautiful artificiallightning with a length of 130mm. (This product adopts the keytype singletrigger mode, and does not have the function of automatic triggering and musicplayback.) Features: It is a perfect teaching tool to spark students' interest of science, also can be a fine gift for teenages. The number of artificiallightning is as high as 1700 times, and it has a fine performances in terms of effect and battery. Compact size for convenient operation and carrying. Large capacity rechargeable battery, long working time. With LED status indicator, battery voltage display, and arc length fine adjustment knob, the operation is more convenient and safer. Specifications: Type: type A, type B (optional) Battery working time: 1700 times Frequency: 1.1-1.3Mhz Electric arc length: 130mm Battery: 12.6V, 2800mAh Item size: 200 * 180 * 71mm / 7.9 * 7.1 * 2.8in Package size: 225 * 205 * 101mm / 8.9 * 8.1 * 4.0in Package weight: 800g / 1.8lb Packing List: 1 * Electric Arc Generator