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Specifications
- Brand Name: Deli
- Style: Scientific
- Max. Digits: 417F
- Certification: CE
- Origin: CN(Origin)
- Power Source: Solar
- Material: Plastic
- Model Number: ED991ES
- Applicable Battery Type: Solar
- COLOR: Black
- STYLE 1: 417 Function Scientific Calculator
- STYLE 2: Display as on Textbook
- STYLE 3: Dual power
Deli 991ES Scientific Calculator 417 Function standard Engineer Calculators middle high school student supplies electronic calcu
Price history
- for 3 month
- for half a year
- Requires Alitools extension
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Customer Reviews
Very high quality calculator. The screen is amazing. The buttons have a really good feeling. Probably the best clone of the original 991 calculator. My only complain is that the screen has a little black scratch in the internal side. The scratch is between the external protection of the screen (the transparent plastic) and the LCD. I opened the calculator and I couldn't split the protection and the LCD, so the screen was damage in the factory. Also, the solar cell is a real cell. Some manufacturers add a fake cell which looks like a real cell to cheat the buyer. That's not the case. I could measure voltage generated by the cell with a multimeter. The calculator will only work if a couple of batteries are installed. The calculator can't work only with the solar power.
All OK