How do you delete the writing? Pressing the button as per instryctions doesn't work. Also the video showing how to retrieve the stylus is useless.

I have two of these calculators and both work fine. The big round button at the top (to the right side of the solar panel) will clear the writing. Maybe you have a faulty one. The pen just slides out.

how long the batteries in these LCD display last?

a year or more and it depends on how many times you use.

How do you change the battery? Mine arrived dead.

Unscrew the screw and unclip/slide it out.

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NEWYES 991ES Plus Scientific Calculator with Writing Tablet, 417 Function with Solar Battery, Professional Upgraded 991ES Plus Calculator Portable Notepad Back to School Supplies for Student, Teacher

Product ID: 533225881

Details

Brand
NEWYES
Calculator Type
Colour
Black
Display type
LCD
Material
Plastic
Model name
NY-CAL

📐417 advanced functions

📝6.5-inch writable tablet

🔋solar + replaceable battery

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2589975₫

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Sold byAmazon VietnamDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

📊 Elevate your calculations—where precision meets productivity!

ALL IN ONE POWERHOUSE - Master complex calculations with 417 built-in functions tailored for engineers, students, and pros.
COMPACT TRAVEL READY - Foldable design protects your calculator and notepad from dust, fitting perfectly in your bag or backpack.
ECO FRIENDLY LONG LASTING - Dual solar panel and replaceable battery ensure uninterrupted performance wherever you go.
PRECISION AT YOUR FINGERTIPS - Premium plastic keys deliver ultra-responsive, comfortable typing for error-free input every time.
WRITE CALCULATE SEAMLESSLY - Integrated 6.5-inch writing tablet lets you jot notes and erase instantly—no more switching devices.

The NEWYES 991ES Plus is a professional-grade scientific calculator featuring 417 functions including matrix, vector, and statistical operations. It uniquely combines a 6.5-inch writable tablet for note-taking with a solar-powered, replaceable battery system. Designed with premium tactile keys and a foldable, dust-resistant cover, it’s the ultimate portable tool for students, teachers, and professionals seeking efficiency and versatility.

Specifications

ASIN	B0C64T6XFG
Best Sellers Rank	7,561 in Stationery & Office Supplies ( See Top 100 in Stationery & Office Supplies ) 38 in Scientific Calculators
Brand Name	NEWYES
Calculator Type	Engineering/Scientific
Colour	Black
Country of Origin	China
Customer Reviews	4.4 4.4 out of 5 stars (1,437)
Display Type	LCD
Enclosure Material	Plastic
Item Dimensions L x W	16.2L x 1.8W centimetres
Item Weight	153 Grams
Manufacturer	NEWYES
Manufacturer Part Number	NY991ES
Model Name	NY-CAL
Model Number	NY-991ES Plus
Number of Batteries	1 9V batteries required. (included)
Power Source	Battery Powered
Product Warranty	1 year
Screen Size	6.5 Inches

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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2589975₫

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In stock

Sold byAmazon VietnamDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Vietnam.

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