<strong>Description</strong> <br>&nbsp; <br>This pen will bring lots of surprises to your daily life. It can write on most surfaces such as T-shirts and paper. But the words will disappear because it features invisible ink. After you illuminate it with the UV-light which is on the pen cap, you will surprisedly find that the words appear as you have written. It's perfect for currency checking, kids game, secret message transfer, etc. <br> <br> <strong>Features</strong>&nbsp; <br>&nbsp; <br>- Color: Red. <br>- Material: ABS. <br>- Size: Approx. 13.3 x 1 x 1cm/ 5.2 x 0.39 x 0.39 inch (LxWxH). <br>- Write invisibly secret messages, security markings etc. and only when you shine the UV light on the message you will reveal the secret behind. <br>- With UV light installed in the so you don't need to buy a spare light, which also comes with button battery in it, convenient to use. <br>- Brings you a variety of fun activities. <br>- Suitable to write on most surfaces such as T-shirts, paper and more. <br>- Small size make it portable to carry, can be used in schools, companies, banks etc. <br>- It also can be used for currency checking.