Can you write on this causing a magnetic image to appear if you attached a small neodymium magnet to the end of dried up pen?

Only if you have a small enough magnet, otherwise the characters would be so large you could only write one word.After reading "Sadly, no." I tried with a small motor magnet and was able to produce "123" and "Hi" that were legible from the front.Not sure if that is useful for you.

Will this show the tracks on magnetic audio tape?

Not usefully. It might just show some magnetic field on a cleverly recorded tape (eg: Like a lightning flash recorder), but neither the resolution nor the contrast would show normal audio tracks. That is simply not it's function.

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Magnet Source Magnetic Field Viewer Card (Pack of 1)

Magnet Source Magnetic Field Viewer Card (Pack of 1)

Product ID: 335043900

Details

Brand
Master
Colour
Blue
Global Trade Identification Number
Manufacturer
0
Material
Plastic
Net Quantity
1.0 Count

📏Compact 2.5" x 4" size

🧲Visualizes magnetic fields instantly

🛡️Durable laminated plastic

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¥3054

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Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🧲 Unlock the invisible—magnetism made visible, anytime, anywhere!

BUILT TO LAST - Laminated plastic construction ensures durability for everyday use and long-term reliability.
CLEAR INSTRUCTIONS INCLUDED - Step-by-step guidance right on the card means no guesswork—get started immediately.
INSTANT MAGNETIC FIELD VIEWER - See invisible magnetic forces in real-time with the integrated magnetic film—perfect for professionals and curious minds alike.
POCKET SIZED MAGNETIC INSIGHT - Carry magnetic field visualization wherever you go with a sleek 2.5" x 4" laminated card.
TRUSTED BY ENTHUSIASTS EDUCATORS - Ranked #3,810 in School Supplies and praised for precision, this tool bridges fun and function.

The Magnet Source Magnetic Field Viewer Card is a compact, durable laminated tool designed to visualize magnetic fields instantly. Measuring 2.5" x 4", it includes clear instructions and a magnetic film, making it ideal for professionals, educators, and enthusiasts seeking a portable, reliable way to explore magnetism.

Specifications

ASIN	B005HYCM8M
Best Sellers Rank	#65,149 in Toys & Games ( See Top 100 in Toys & Games ) #4,713 in School Supplies
Brand	Master Magnetics
Colour	Blue
Customer Reviews	4.2 out of 5 stars 195 Reviews
Enclosure Material	Plastic
Global Trade Identification Number	00095421005635
Item Type Name	magnetic
Manufacturer	0
Manufacturer Part Number	DMVC-1BX
Material	Plastic
Model number	DMVC-1BX
Number of Pieces	1
Shape	Rectangular
Size	2.5 x 4 inch
UPC	095421005635
Unit Count	1.0 Count

Reviews

D**H

17.01.2024

D**L

26.08.2022

A**R

23.04.2026

M**N

6.03.2023

N**S

8.05.2017

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¥3054

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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