Dart Backboards Note:Automatic target built-in gear accessories. It is not allowed to manually reset the target. It needs to be reset automatically. External force intervention will lead to damage of internal parts. This is the laser target . After the target senses the laser shooting, it will automatically score and reset. Suitable for laser darts, laser toy guns, laser pens, laser toys, etc. (This product can only sense laser, and has no laser itself) We carefully tested each product when it was sent out, so please carefully watch the entire video tutorial before using it. Package description: target body (built-in battery) X1; Track piece X3, USB charging cable X1 The rail block shall be aligned during installation. When it is separated, it shall be bent by 5 - 15 and then pulled apart by parallel force. Please watch the video carefully to avoid damage. PLAYFUL BAG brand is committed to developing products that make customers happy. We hope that the products can bring happiness to you or your relatives and friends, soplease watch the video carefully before using.