Attributes

Brand	-
Category	Stationery, Educational Electronics & Office Supplies / Calculators
Origin	-
Brand	Deli
Model Number	TE28 (SJJF-1)
Display Type	Large LCD with 12 Digits
Voice Feature	Real Human Pronunciation in English
Power Source	Dual Power (Solar + Battery)
Key Material	Soft-Touch Plastic
Dimensions	6.5 x 4.8 x 1.2 inches
Weight	7.2 ounces
Color	Black and Silver
Warranty	1 Year Manufacturer Warranty

6 reviews

Anonymous

Mar 25, 2026

Rating: 5/5

Excellent visibility and sound

As someone with slightly impaired vision, this calculator is a blessing. The numbers are massive, and the clear human voice confirms my calculations. Highly recommended for seniors or anyone who wants extra confirmation.

Anonymous

Mar 22, 2026

Rating: 5/5

Perfect for my accounting tasks

The voice feature is a game changer. It reads out every number I type, which helps me catch errors immediately during long data entry sessions. The display is huge and easy to read even in low light.

Anonymous

Mar 14, 2026

Rating: 5/5

Sturdy and reliable

Been using this for three months in my small business. It feels very durable, the keys have a nice click, and the solar backup means I rarely need to change batteries. The voice pronunciation sounds very natural.

Anonymous

Mar 13, 2026

Rating: 4/5

Good value for money

Does exactly what it says on the box. The voice is clear and not robotic. I deducted one star because the stand angle is fixed, but overall it's a great purchase for the price.

Anonymous

Mar 11, 2026

Rating: 5/5

Best calculator I've owned

The combination of the large screen and the voice output makes complex calculations much less stressful. It's become an essential part of my daily workflow in the finance department.

Anonymous

Mar 10, 2026

Rating: 4/5

Great tool, slightly loud

I love the accuracy and the large buttons. My only complaint is that the volume cannot be adjusted, so it can be a bit loud in a quiet office environment. Otherwise, it's a solid calculator.

5 FAQ

Q: Is the voice available in languages other than English?

A: No, this specific model (SJJF-1) only supports English voice pronunciation. Other models may support different languages.

Q: How large are the digits on the display?

A: The display features 12-digit capacity with extra-large characters designed for easy readability from a distance or for users with visual impairments.

Q: Can the voice volume be turned off or adjusted?

A: The volume can be toggled on or off using the dedicated switch on the side, but there is no intermediate volume adjustment setting.

Q: Does it have a memory function to store previous calculations?

A: Yes, it includes standard memory functions: Memory Plus (M+), Memory Minus (M-), Memory Recall (MR), and Memory Clear (MC).

Q: What type of battery does this calculator require?

A: It requires two AAA batteries, which are included in the package for initial setup. It also has a solar panel for auxiliary power.

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