This is an upgraded web-launcher device. The principle is to launch the projectile and string by spring force. The projectile with a magnet can adhere to iron products after being launched. If the magnet is equipped with a suction cup, the projectile can adhere to a smooth and flat object. With the built-in rechargeable battery and motor, you can quickly retrieve the string by pressing the reel-in switch. How to use？ Launch 1. Press the spring until you hear a "click" sound, indicating that the launch is ready. 2. Use your ring finger or middle finger to press the launch board and maintain the position for about 2 seconds until the launch is completed (Note: if you release the pressure midway, it may cause the launch to be interrupted). Recovery 1. Ensure that the launch board is released. 2. Press the reel-in switch until the string is fully retracted. FAQS: Q: Why does the Item not charge or retract? A: The following situations indicate that the charging function is normal：1.Light on when charging; 2. Turn off after being fully charged. Usually charging is not a problem, the problem may be a faulty retraction ( string tangled); Regarding the issue of not retracting, please take a look at the next item. Q: What should I do if the Item doesn't retract? A: 1. Open the cover manually without any tool. (The instruction manual is accompanied by image guidance) 2. Take out the whole string from the box and untie any knots. 3. Pull out the whole string from the launch port. 4. Install the cover back in place and resume normal Q: What if it can be retracted normally but the launch distance is very short? A: Use your ring finger or middle finger to press the launch board and maintain the position for about 2 seconds until the launch is completed(Note: if you release the pressure midway, it may cause the launch to be interrupted).