---
product_id: 128875899
title: "LED Back-Light Calculator Desktop SMT-200 / Added Sound Function (White)"
brand: "unione"
price: "$29.14"
currency: USD
in_stock: false
reviews_count: 8
url: https://www.desertcart.ec/products/128875899-led-back-light-calculator-desktop-smt-200-added-sound-function
store_origin: EC
region: Ecuador
---

# LED backlight 6.4" x 4.5" size 1 AAA battery LED Back-Light Calculator Desktop SMT-200 / Added Sound Function (White)

**Brand:** unione
**Price:** $29.14
**Availability:** ❌ Out of Stock

## Summary

> 💡 Light Up Your Calculations with Style!

## Quick Answers

- **What is this?** LED Back-Light Calculator Desktop SMT-200 / Added Sound Function (White) by unione
- **How much does it cost?** $29.14 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/128875899-led-back-light-calculator-desktop-smt-200-added-sound-function)

## Best For

- unione enthusiasts

## Why This Product

- Trusted unione brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Sleek Design:** A modern white finish that complements any workspace.
- • **Compact & Portable:** Perfectly sized for your desk or on-the-go.
- • **Eco-Friendly Power:** Powered by a single AAA battery, included for your convenience.
- • **Sound Functionality:** Enjoy auditory feedback with every calculation.
- • **Illuminate Your Calculations:** Experience clarity with a vibrant LED backlight.

## Overview

The UNIONELED Back-Light Calculator Desktop SMT-200 combines functionality with modern design. Featuring a bright LED backlight for easy visibility, this compact calculator is powered by a single AAA battery (included) and offers standard functions with an added sound feature for an engaging user experience. Its sleek white finish makes it a stylish addition to any professional workspace.

## Description

desertcart.com : LED Back-Light Calculator Desktop SMT-200 / Added Sound Function (White) : Office Products

Review: Backlight works great. - This item has a lot of negative reviews and was cautioned with its high return rate. It was the only battery operated calculator with a backlit display at a great price point. I took my chances and ordered one. There were many negative reviews about the backlight not working. Mine works fine. You can turn off the confirmation beep if needed. Yes, the decimal key is located in an awkward position. That was not a dealbreaker for me. I’ve had it for over a week now and it’s still working perfectly. I hope this review helps with deciding to purchase.
Review: FINALLY! A calculator I can read! - I've been so disgusted trying to read LCD calculators, and have often wondered why I can't just pay a little bit more for one that I can actually read. Finally, browsing around, I found these little beauties. They are exactly what I was looking for. First off, there is a nice backlight, which makes them easy to read. LOVE THAT! Then, they have a sound function which can be turned on or off. Personally, I love having it on so there's an audio clue whenever a button is pushed. Speaking of buttons...the buttons are HUGE, making them easy to find and easy to use. My only quibble, and it's one that I'll get used to, I'm sure, is the placement of the decimal key. It's up at the top instead of down at the bottom where I keep looking for it. Not a big deal, but moving it to the bottom would make these perfect.

## Features

- LED Back-Light Calculator Desktop SMT-200W

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Number of Batteries | 1 AAA batteries required. (included) |
| Display Type | LCD |
| Power Source | Battery Powered |
| Calculator Type | Standard Function |
| Item Dimensions L x W | 6.4"L x 4.5"W |
| Color | WHITE |

## Product Details

- **Brand:** UNIONE
- **Color:** WHITE
- **Calculator Type:** Standard Function
- **Power Source:** Battery Powered
- **Number of Batteries:** 1 AAA batteries required. (included)

## Images

![LED Back-Light Calculator Desktop SMT-200 / Added Sound Function (White) - Image 1](https://m.media-amazon.com/images/I/710nZ20BSJL._SS80_.jpg)
![LED Back-Light Calculator Desktop SMT-200 / Added Sound Function (White) - Image 2](https://m.media-amazon.com/images/I/710nZ20BSJL.jpg)
![LED Back-Light Calculator Desktop SMT-200 / Added Sound Function (White) - Image 3](https://m.media-amazon.com/images/I/71koYKlzBOL._SS80_.jpg)
![LED Back-Light Calculator Desktop SMT-200 / Added Sound Function (White) - Image 4](https://m.media-amazon.com/images/I/71koYKlzBOL.jpg)
![LED Back-Light Calculator Desktop SMT-200 / Added Sound Function (White) - Image 5](https://m.media-amazon.com/images/I/71wFNVj2-xL._AC_UF894,1000_QL80_.jpg)

## Questions & Answers

**Q: I have replaced the batteries twice since Christmas 2020, is anyone having the same problem?**
A: I had the same problem, and noticed the light will not turn off, therefore runs 24-7 draining the batteries. I returned it and plan to order another, hoping it doesn't have the same problem.

**Q: Does the calculator speak key strokes and answers. Need speaking calculator fir 5 year old**
A: This calculator only gives sound when pressed.

**Q: Can you permanently mute the sound?**
A: No! You have to press the sound button to turn on and off!

**Q: How long does the battery last?**
A: Not sure how long I’ve had mine but have never had to change it

## Customer Reviews

### ⭐⭐⭐⭐⭐ Backlight works great.
*by F***T on February 24, 2025*

This item has a lot of negative reviews and was cautioned with its high return rate. It was the only battery operated calculator with a backlit display at a great price point. I took my chances and ordered one. There were many negative reviews about the backlight not working. Mine works fine. You can turn off the confirmation beep if needed. Yes, the decimal key is located in an awkward position. That was not a dealbreaker for me. I’ve had it for over a week now and it’s still working perfectly. I hope this review helps with deciding to purchase.

### ⭐⭐⭐⭐⭐ FINALLY! A calculator I can read!
*by P***H on August 24, 2022*

I've been so disgusted trying to read LCD calculators, and have often wondered why I can't just pay a little bit more for one that I can actually read. Finally, browsing around, I found these little beauties. They are exactly what I was looking for. First off, there is a nice backlight, which makes them easy to read. LOVE THAT! Then, they have a sound function which can be turned on or off. Personally, I love having it on so there's an audio clue whenever a button is pushed. Speaking of buttons...the buttons are HUGE, making them easy to find and easy to use. My only quibble, and it's one that I'll get used to, I'm sure, is the placement of the decimal key. It's up at the top instead of down at the bottom where I keep looking for it. Not a big deal, but moving it to the bottom would make these perfect.

### ⭐⭐⭐⭐ Nice Lit Up Display, Only One Sound, Not Musical
*by S***E on September 18, 2025*

It seems to be a nice calculator but I was disappointed that it's not a musical calculator like my 1970s school days had. Its the same sound. I'm keeping it though because its easy to read and I like the dual power as opposed to just solar.

## Frequently Bought Together

- LED Back-Light Calculator Desktop SMT-200 / Added Sound Function (White)
- CATIGA 12 Digits Desktop Calculator with Large LCD Display and Sensitive Button, Dual Solar Power and Battery, Standard Function for Office, Home, School, CD-2786
- Desktop Calculator Extra Large 5in LCD Display 12-Digit Big Button Giant Accounting Calculator, Battery & Solar Powered, for Office Business & Home(OS-6815)

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*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-02-25*