Bút mực tàng hình có đèn UV

Magic Invisible Ink Pen Writing Secret Message Gadget With UV Light Stationery 100% brand new and high quality. Features: This fine point marker, is loaded with special ink that is only visible under UV light. It includes a mini LED UV black light with batteries, so you can view your messages. The invisible ink pens are very popular around people, which can creat a lot of fun. People can use it to communicate secrectly and hide messages. Children think that they are secret agents with these pens, lay mystery adventures and writing clues for each other. You can make secret spy messages with your friends. The pens also can be used widely. Perfect for themake a fun party favor, for drawing, secret message writing, currency checking, security marking. It is a great gift for your lover, family and friend. Specifications: Type: Ink Pen Powered by: Button cell battery (included) Material: Plastic Color: Random delivery (If you buy more than one,the color you received may be the same or different colors) Pen Length: app.13cm/5.12in Quantity: 1 Pc Note: 1.Transition: 1cm=10mm=0.39inch 2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x Invisible Pen (without retail package)