Why shop Mr. Pen?
- Small American Family Business
- Founded by Teachers in Louisiana
- We love our customers
Our story
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.
Top Selling Products
Are batteries included?
Yes
What type of battery does it take?
LR1130 button battery
Are the numbers bright enough?
Yes, they appear very well on the screen.
How many decimals does this calculator show?
11 decimals
Mr. Pen- Calculators
 Calculator |  Calculator |  Calculator |  Calculator | |
|---|---|---|---|---|
Customer Reviews | — | — | — | — |
Price | — | — | — | — |
Color | Blue | Black | Black | Black |
Number of Lines in Display | 1 | 2 | 2 | 1 |
Power Source | Solar and Battery | Battery | Solar and Battery | Solar and Battery |
Size | 4.6? X 2.6? X 0.4? | 6? X 3.3? X 0.6? | 6.37? X 3.15? X 0.64? | 5.7? X 4.7? |
Easy to Press | ? | ? | ? | ? |
Are batteries included?
Yes
What type of battery does it take?
LR1130 button battery
Are the numbers bright enough?
Yes, they appear very well on the screen.
How many decimals does this calculator show?
11 decimals
Mr. Pen- Calculators
Calculator | Calculator | Calculator | Calculator |
|---|---|---|---|
| Customer Reviews | |||
| — | — | — | — |
| Price | |||
| — | — | — | — |
| Color | |||
| Blue | Black | Black | Black |
| Number of Lines in Display | |||
| 1 | 2 | 2 | 1 |
| Power Source | |||
| Solar and Battery | Battery | Solar and Battery | Solar and Battery |
| Size | |||
| 4.6? X 2.6? X 0.4? | 6? X 3.3? X 0.6? | 6.37? X 3.15? X 0.64? | 5.7? X 4.7? |
| Easy to Press | |||
| ? | ? | ? | ? |
Why shop Mr. Pen?
- Small American Family Business
- Founded by Teachers in Louisiana
- We love our customers
Our story
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.
Top Selling Products