Scientific Calculator with 417 Functions – Deli D991ES

Enjoy accurate performance and ease of use with the Deli D991ES scientific calculator 🔢.

It features a sleek design and a large display screen that shows equations just like in textbooks 📘.

It operates on dual power (solar + battery) to provide a long operating life ⚡, and supports 417 advanced functions to meet the needs of students, teachers and engineers.

It also features a sliding cover for protection and an automatic shut-off function to save energy 🔋.

Features and benefits:

• It contains 417 scientific and engineering jobs .
• A large “Textbook Display” screen for displaying equations in an organized and clear manner.
• Dual operation: solar power + battery (2 LR44 batteries).
• Automatic/manual shut-off feature to save energy.
• A sliding cover to protect the device.
• 3-year manufacturer's warranty .
• Suitable for school, university and office use.

Technical specifications:

• Brand: Deli.
• Model: D991ES.
• Number of jobs: 417.
• Power source: Solar power + 2 x LR44 batteries.
• Screen type: Widescreen LCD (Textbook Display).
• Stop function: Automatic and manual.
• Country of origin: China.
• Warranty: 3 years.