Features:

1. 100% Brand New&High Quality

2. Invisible/Secret ink pen & built in UV light

3. Invisible to the naked eye & message can only be seen under the light of UV light

4. Emergency Light Can be written on paper， metal， plastic

5. Made of plastic &Easily carried & batteries included.

6. Boys Girls Great Party bag fillers toys for kids

7. Colour: Blue， Purple Red，Green

Package Included: 1x 4 Colours UV Light Pen

UV light is also useful for detecting counterfeit bank notes.
Suspect someone is stealing cash?
Simply use the pen to make a distinguishing mark and use the UV light to make checks.

Invisible ink pens are great for marking all kinds of surfaces and applications，especially paper.