Attributes

Brand	-
Category	Stationery, Educational Electronics & Office Supplies / Calculators
Origin	-
Brand	Deli
Model Number	77550
Display Digits	12
Voice Function	Real Human Pronunciation
Key Type	Crystal Clear Keys
Power Source	Solar + Battery (LR1130)
Screen Size	Large LCD Display
Color	Black/Silver
Dimensions	16.5 x 11.2 x 3.8 cm
Recommended Use	Office, Home, School

6 reviews

Anonymous

Mar 27, 2026

Rating: 3/5

Good but voice can be repetitive

The calculator functions well and the display is huge. However, if you make a mistake often, the voice repeating the error can get a bit annoying after a while.

Anonymous

Mar 23, 2026

Rating: 5/5

Reliable and durable

Been using this for six months in a busy accounting environment. It still works perfectly. The solar power backup ensures I never run out of battery during tax season.

Anonymous

Mar 19, 2026

Rating: 5/5

Best purchase for students

Bought this for my daughter who is learning math. Hearing the numbers helps her catch errors immediately. Highly recommend for anyone learning arithmetic.

Anonymous

Mar 12, 2026

Rating: 4/5

Great office tool

I use this daily for inventory checks. The large screen is easy to read from a distance. The only minor issue is that the voice volume cannot be adjusted, but it is not too loud.

Anonymous

Mar 06, 2026

Rating: 5/5

Crystal clear keys

The buttons feel premium and click satisfyingly. No more accidental presses like on my old rubber-key calculator. The pronunciation is surprisingly natural.

Anonymous

Mar 06, 2026

Rating: 5/5

Perfect for my elderly mother

The voice feature is a game changer. My mother has trouble seeing small numbers, and hearing the calculation spoken aloud gives her confidence. The keys are also very responsive.

5 FAQ

Q: Can the voice function be turned off if I want silence?

A: Yes, there is a dedicated switch on the back of the calculator to toggle the voice function on or off.

Q: What is the warranty period for this item?

A: The Deli 77550 comes with a standard 1-year manufacturer warranty covering defects in materials and workmanship.

Q: Is the language English only?

A: Yes, the voice pronunciation for this specific international model is in English.

Q: Does it have a memory function?

A: Yes, it includes standard memory functions: M+, M-, MR, and MC for storing and recalling calculations.

Q: What type of batteries does this model require?

A: This calculator uses one LR1130 button battery, which is included in the package. It also has a solar panel for primary power.

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