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Mr. Pen

Mr. Pen- Mechanical Switch Calculator, 12 Digit Large LCD Display, Pink

  • Based on 3,821 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Monday, Oct 19
Order within 16 hours and 40 minutes
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Color: Pink


Features

  • Mr. Pen 12-digit calculator is perfect for completing basic numerical calculations, making it ideal for office, primary school, market, or even home use. It features big, sensitive keys that are easy to press down and offer quick data entry.
  • The mechanical switch buttons offer a responsive and satisfying click with each press, similar to a mechanical keyboard, improving the overall user experience and precision of data entry. Equipped with essential functions like memory recall, percentage calculation, and more, it meets a variety of computational needs.
  • Operating on just one AAA battery (not included), this calculator is designed with an automatic shutdown feature that activates after 10 minutes of inactivity, conserving battery life and ensuring longevity.
  • Mr. Pen calculator is the perfect tool for quickly dealing with everyday calculation problems in various settings such as schools, offices, or even at home! It offers a fast, efficient, and user-friendly experience that makes it an ideal choice for anyone looking for a reliable calculator.

Description

- Small American Family Business - Founded by Teachers in Louisiana - We love our customers Having firsthand experience teaching in at-risk schools in different parts of the United States, seeing the daily struggles of students and teachers, we, a few business-minded teachers, founded Mr. Pen with a simple purpose: serving the schools in our community by providing them with high quality and affordable school supplies and tools to help them in their efforts. Calculator Calculator Calculator Calculator Calculator

Brand: Mr. Pen


Color: Pink


Calculator Type: basic


Power Source: Battery Powered


Screen Size: 4.4 inches


Brand: Mr. Pen


Model Name: mechanical switch calculator


UPC: 840316909471


Unit Count: 1 Count


Manufacturer: Mr. Pen


Number of Items: 1


Model Number: LTNT001M313


Mfr Part Number: LTNT001M313


Calculator Type: basic


Power Source: Battery Powered


Screen Size: 4.4 inches


Number of Batteries: 1 AAA batteries required.


Display Type: LCD


Color: Pink


Enclosure Material: Plastic


Item Dimensions L x W: 6.2"L x 4.4"W


Item Highlight: With Big Buttons, Mechanical Switch Calculator for Home, School, Office


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Oct 19

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
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  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Great basic calculator and great for my sensory child's needs.
Color: Twilight
I purchased this for my autistic child. He loves it! He loves the slight sounds the calculator makes when he presses the keys. He loves the color and the size. He has enjoyed using this since he got it, school starts next week and so he will have something he likes and needs. Hard to sometimes meet his sensory needs and basic school needs all in one item. The keys are big, stand out and that is a plus. ... show more
Reviewed in the United States on August 23, 2026 by SAmazon Customer
    • Mr Pen calculator
Color: Pink
I love it! The size is great I love the pink color and personalized note is so cute. Thank you I will definitely buy again. The calculator needs 1 AAA, very satisfying sounds, and they won’t be loosing it, because it’s big, the kids love it too. Win win. Love the mustache sticker too ☺️
Reviewed in the United States on August 24, 2026 by Karen
    • Cute, Easy to Use, and Worth It
Color: Purple
Review Image by Jennifer
I really like this calculator. The display is nice and clear, so the numbers are easy to read without having to stare at the screen, and the button layout makes sense right away. The mechanical keys are probably my favorite part. They have a really nice feel when you press them and make the calculator more enjoyable to use than the usual flat-button ones. The buttons respond well, and the calculator feels stable on the desk instead of sliding around while I’m typing. I also like the size. It’s big enough that the buttons aren’t cramped, but it doesn’t take up a ridiculous amount of desk space. The purple color is cute too, which is honestly part of why I chose it. The solar-powered feature is another nice bonus because I don’t have to worry about constantly replacing batteries. For the price, I think it’s a really good value. It’s easy to read, functional, sturdy, a good size, and actually looks nice sitting on my desk. I’ve been very happy with it so far and would definitely recommend it. ... show more
Reviewed in the United States on September 23, 2026 by Jennifer
    • Easy to use
Color: Pink
I love this calculator the color is great I’ve had it for almost two years and only had to change the battery once.
Reviewed in the United States on September 26, 2026 by jessica santos
    • Multicolor calculator
Color: Pastel Harmony
Review Image by Bettyann
Review Image by Bettyann
Nice large buttons but it does not come with a battery you have to supply your own AAA battery.
Reviewed in the United States on May 4, 2026 by Bettyann
    • Great calculator and easy to use!
Color: Pink
Review Image by Anna
I really like this MR. PEN mechanical switch calculator. The 12-digit display is clear and easy to read, and the buttons are comfortable to press. also it uses AAA batteries, which are easy to replace. It’s simple, practical, and works great for everyday calculations. Definitely worth it!
Reviewed in the United States on September 2, 2026 by Anna
    • I wish I could give this more than 5 stars
Color: Creamy Citrus
Review Image by The Bells
Review Image by The Bells
Literally *just* got this delivered and my 7th graders are over the moon excited! They came with little hand written thank you cards and mustache stickers. They make the best clacky sound AND they are battery powered! The last fact is what send one of my kids over the moon (the solar powered ones kinda suck for indoors). Highly recommend! The only (and I'm really reaching) thing that could be improved is there is no power off button. We assume they will just shut off after a certain period of no use, but turning on with a touch will drain the batteries pretty quick in the backpack. ... show more
Reviewed in the United States on August 18, 2026 by The Bells
    • Pros & Cons.
Color: Twilight
Review Image by xXBloomXx
Came with no instruction manual. Had a card offering returns no matter how long you’ve had it though. It didn’t appear the same colors as online. It’s a bigger calculator, making it hard to carry around. I will say it is really cute. Like most calculators, you can not read the screen at a certain angle. I like how big and clicky the buttons are. It makes it hard to accidentally click something. It would have been cool if it came with a case for it so I can carry it around safely. It has no on/off switch. It came with scratches. ... show more
Reviewed in the United States on July 22, 2026 by xXBloomXx

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