Texas Instruments TI-31 Solar Scientific Calculator Vintage Working

Vintage Texas Instruments TI-31 Solar Scientific Calculator. Perfect for math, science, and engineering students or collectors of classic electronics. Fully functional and solar-powered—no batteries needed! 📦 Shipping: Ships safely and securely. 🕒 Fast Dispatch: Shipped within 1 business day. 📧 Questions? Feel free to message us anytime. 🔑 Key Features: Model: TI-31 Solar Brand: Texas Instruments Power: Solar-powered, no batteries required Functions: Scientific operations including trig, logs, powers Condition: Tested and working Great for students, professionals, or vintage tech enthusiasts Grab a reliable calculator or add to your collection today!