1. Electromagnetic launcher is a technology that uses electromagnetic force to accelerate the launch of objects, using electromagnetic pulses to accelerate the projectile to a high-speed state, and then launch it at a very high speed. 2. The Enhanced electromagnetic cannon kit, we have reduced the complicated wiring method, greatly reduced the difficulty of welding, and made it more suitable for novice DIY. At the same time, we have added power, charging, and launch indicator lights, which can more clearly observe the operating status of the electromagnetic cannon. 3. With a Level indicator circuit, which allows for more convenient observation of the charging status. 4. The bottom battery box design is beautiful and convenient, with a more beautiful appearance. 5. This kit is suitable for welding exercises, electronic experiments, and DIY enthusiasts. Working voltage:DC 3V Power supply method:2 x AA batteries (requires self provided batteries) Accumulated current:50-65mA Emission current:70-80mA Operation instructions: 1. Turn on the power switch (switch SW1), and the red and green LEDs will light up. 2. Wait for about 10 to 30 seconds, and the blue light will light up. The brighter the blue light, the farther the firing distance. 3. Insert the projectile from the back of the barrel. 4. Press the launch button (round button K3), and the shell will fly out of the barrel, and the firing is complete. Safety Tips: Do not shoot at people or fragile objects during use to avoid shooting danger! The project is being carried out under high pressure, do not touch metal parts when starting up! Colour:Black & parent Material:PCB+electronic components+acrylic Package Contents: 1 * electromagnetic mitter DIY kit with case Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color