🔢 Elevate your calculations—where precision meets portability!
The Joinus Cal Star HK-991ESP is a professional-grade scientific calculator featuring a natural textbook-style 2-line display with 10+2 digits, 417 functions, and dual power sources (solar + battery) for uninterrupted use. Its adjustable brightness and ultra-light design with a protective slide case make it ideal for busy professionals seeking accuracy and convenience.
| Manufacturer | Joinus General Trading Co L.L.C |
| Brand | Cal Star |
| Model number | HK-991ESP |
| Product Dimensions | 16 x 8 x 0.1 cm; 360 g |
| Batteries | 1 LR44 batteries required. (included) |
| Color | Silver |
| Material Type | Plastic |
| Number of Items | 1 |
| Size | Standard Scientific Calculator |
| Manufacturer Part Number | HK-991ESP |
| Item Weight | 360 g |
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