Multifunction Luminous Light Invisible Ink Pen Big Money Detector LED Light Pen Toy Pen Describe invisible light pen, the ink is invisible ink, writing can be seen, you need to light to see. Built-in light, children will write a lot of messages to each other, invisible to the naked eye, light will appear on the text Note: You can write on most surfaces, but whether you can stay on the surface depends on what you write. If you write on paper, it can be kept forever; if you write on metal or plastic It may last long because it can be easily erased due to the properties of metal and plastic. Pecification Color: Red, yellow, green, blue, purple, black, Weight: about 10g Material: plastic Size: about 13.5x1x1cm/5.31x0.39x0.39 inches Include 1X invisible ink pen Tips: 1. Due to the different display and lighting effects, the actual color may be slightly different from the picture color. 2. Due to manual measurement, allow a difference of 1-5cm, thank you! 3.Comes with button batteries, the batteries have protective inserts, pull out before use. 【Precision in Every Line】 Achieve precise and clean lines with our colored gel pens. The fine tips ensure accuracy, making them perfect for detailed drawings, intricate designs, and note-taking. 【Smooth and Consistent Ink Flow】 Experience a smooth and consistent ink flow with our gel pens. The high-quality ink glides effortlessly on paper, providing a reliable and enjoyable writing or drawing experience. 【Vibrant and Diverse Color Selection】 Express your creativity with a diverse range of vibrant colors. Our colored gel pens offer an array of shades, allowing you to add flair to your projects and make your artwork or notes visually appealing. 【Quick-Drying and Smudge-Proof】 Enjoy the convenience of quick-drying ink that minimizes smudging. Whether you're left- or right-handed, our colored gel pens ensure your work stays neat and smudge-free. 【Versatile and Multi-Purpose】 Designed for a variety of uses, our colored gel pens are versatile tools. Whether you're journaling, coloring, or adding accents to your work, these pens provide the versatility needed for creative expression.