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Home / Highlighters / Invisible Fluorescent Highlighter Pen with UV Light, Colorless Glow-in-the-Dark Dual-Tip Secret Marker with Ballpoint Tip for Invisible Writing, Children's Secret Diary Light-Up Transparent Marking Pen

Attributes

Brand -
Category Stationery, Educational Electronics & Office Supplies / Highlighters
Origin -
Ink Type Colorless Fluorescent Ink
Tip Configuration Dual-Tip (Highlighter + Ballpoint)
Light Source Integrated UV LED Light
Visibility Condition Visible only under UV light
Ink Color Transparent / Glows Blue-Green
Body Material Durable ABS Plastic
Power Source Replaceable Button Cell Battery
Ideal Use Case Secret Notes, Studying, Games
Age Recommendation 8 Years and Up
Package Includes 1 Pen, 1 Extra Battery, User Manual

6 reviews

A

Anonymous

Mar 23, 2026

Rating: 5/5

Perfect for secret notes!

My kids absolutely love this pen. They use it to write secret messages in their diaries that only show up when they turn on the little UV light. The ink is truly invisible until exposed to the light, and the ballpoint tip works great for regular writing too.

A

Anonymous

Mar 17, 2026

Rating: 4/5

Fun study tool

I bought this to highlight key points in my textbooks without making the pages look messy. It works well, though the UV light could be slightly brighter. Overall, a fun and functional stationery item.

A

Anonymous

Mar 14, 2026

Rating: 5/5

Great quality for the price

The build quality is surprisingly good. The cap clicks on securely, and the UV light is bright enough to reveal the writing instantly. It's become a favorite toy for my nephew during our family game nights.

A

Anonymous

Mar 13, 2026

Rating: 3/5

Battery died quickly

The concept is awesome and the ink works as advertised. However, the included battery only lasted about two weeks of moderate use. Make sure to have a replacement CR2032 battery ready.

A

Anonymous

Mar 07, 2026

Rating: 4/5

Works exactly as described

No complaints here. The ink dries fast and doesn't smear. The UV light is small but effective. Just remember that sunlight can sometimes make faint traces visible, so keep your secrets indoors!

A

Anonymous

Mar 05, 2026

Rating: 5/5

Amazing gift idea

Bought this as a stocking stuffer and it was a huge hit. The dual tip is very convenient, allowing for both highlighting and fine writing. The glow effect is magical and keeps children entertained for hours.

5 FAQ

Q: Does the ballpoint tip write in normal ink?

A: Yes, one end is a standard blue or black ballpoint pen for regular writing, while the other end is the invisible fluorescent highlighter.

Q: Can I refill the ink once it runs out?

A: No, this specific model is designed as a disposable unit once the ink is depleted, but the battery is replaceable.

Q: Does the pen come with extra batteries?

A: Yes, the package includes one pre-installed battery and one spare replacement battery.

Q: How long does the UV light last on a single battery?

A: Under normal usage conditions, the UV LED light typically lasts for approximately 20 to 30 hours of continuous use.

Q: Is the ink safe if it gets on skin?

A: Yes, the ink is non-toxic and water-based. It washes off easily with soap and water.

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