MQ-826 dual-headed ballpoint pen with one side being a normal ballpoint and the other being an invisible ink pen. This pen features both check and writing functions. After writing for 20 seconds, the ink disappears, but it can be seen clearly after using the included UV light. The ink dries immediately and the writing disappears instantly. The pen body is decorated with floral patterns, and the product comes in a variety of colors. There is a card capacity of 1008 cards per piece. It is packaged in a card-absorbing box and is widely exported to various parts of the world. The quality is stable and the price is reasonable.