Does what it says.
comes with batteries and everything you need to use it.
very easy to use and handle.
You can use it to write passwords in certain locations. Very childish design.
Batteries down't last too long. *Most important - if you look well on your writing ... Read more
I absolutely love these things!! They are so fun and simple to use! Both kids and adults love it! Great for secret messages. Work on skin and paper. Even great for couples ;] The battery runs out a little fast. But since they're so cheap - just buy 3! :D Always remember to put the cap back on when you'... Read more
The ink is really invisible without the light. The light is strong and with it the ink stands out great. The pen have a good grip and it's almost the size of a ordinary pen (except for the light part, which is a little... fat). None that I can think of. Actually, the only thing about it I don't like ... Read more
It works really well. Once you use write something, it is hard to read it unless you use the light and, for sure, nobody will suspect that something has been written in that piece of paper. The use for sending hidden messages to another people requires that they also have another pen. I found it valuable ... Read more
It is working You will probably use it one or two times. A nice game and then you ft it.orge You will probably use it one or two times. A nice game and then you ft it.orge You will probably use it one or two times. A nice game and then you ft it.orgeYou will probably use it one or two times. A nice game ... Read more
Really works, lets your kids play spies. :) Use this to leave an invisible mark on just about anything you want to find/check later. Still marginally visible under bright light (not always and you have to know where to look). Don't push it hard and you should be safe. If you discover that someone is ... Read more
this is a cool little gadget. i bought it basically cuz i had nothing else to spend a dollar on. thats one of the pros this was a dollar something. anyways the concept of a secret message was appealing to me so i went for it. let me tell you i do not regret it. theres nothing wrong with it that i have ... Read more
Very reliable, do the job!
The light is very very britght, you can light on a room just with this LED. The ink sometimes is week, but if you shake the pen, you solve it.
The purple color of the pen is a girl thing, but you can find it inside every bag or pocket. Nice package, and all the structure of ... Read more
Works smoothly ,useful, cheap, tested it on a wall and when I flash the led the writing was noticeable, it's good. The writing stay on the wall (can'T be wiped off). Maybe the design of the container of the led lamp could be better looking, it's rather big, and a bit ugly. But it still functional, Maybe ... Read more
Easy to use.
UV LED is relatively bright.
Nothing is soldered at all, so it should be easy to fix if it stops working.
Batteries are easy to replace.
Ink dries fast and is completely invisible until UV light is used to view it.
Felt tip is relatively fine. Materials used are cheap, but it ... Read more
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